### ICSE X Physics Machines

## **why can't a machine work as a force and a speed multiplier simultaneously?justify.**

**why can't a machine work as a force and a speed multiplier simultaneously?justify.**

**sankar.goswami**12th July 2015 11:36 AM

### CBSE X Physics Electricity

##
- How does the air get ionised?
- Give relation between momentum and force.

Math question

- If the quadratic equation px^2^ +qx +r has the same sign as that of p, then find the relationship between p,q and r.

- How does the air get ionised?
- Give relation between momentum and force.

Math question

- If the quadratic equation px^2^ +qx +r has the same sign as that of p, then find the relationship between p,q and r.

**samanvay.lakhotia**12th May 2016 1:51 PM

### CBSE VIII Science Force and Pressure

## It is mandatory for an object to move its place when we apply force on it or not?

**kshitij.juhi**31st May 2016 7:11 PM

### CBSE IX Physics Work and Energy

## Plz solve question no 5 with proper explanation

**adityaahuja099**27th November 2017 8:07 PM

### ICSE X Physics Machines

## tension here is acting in direction of effort
But should not it act opposite direction

**lovemaan5500**8th December 2017 12:59 PM

### ICSE X Physics Force

## Draw a graph showing relation bw acceleration and force and mass
Also explain it

**lovemaan5500**16th December 2017 4:26 PM

### CBSE IX Physics Force and Laws of Motion

## A truck is hauling a trailer along a level road as figure illustrates.The mass of truck is m1=8500kg and that of the trailer is m2=27000kg.The 2 move with an acceleration of a=0.78m/s^2.Ignore the regarding forces of friction and air resistances.
(a)The magnitude of the tension in the horizontal drawbar between the trailer and the truck.
(b)The force that propels the truck forward:
(c)The action and reaction forces are:

**saxenas55555**1st January 2018 11:44 PM

### CBSE VIII Science

## Differnces between conatct and non-contact force in point fast.

**Singhrinki534**22nd January 2018 7:50 PM

### CBSE XI Science Physics

## A bullet of mass 0.03kg enters a block of wood with velocity of 600m/s and penetrative to a depth of 0.6m. Calculate the avenger resistive force exerted by the wooden block on bullet

**Rovelglad46**31st January 2018 9:51 PM

### NEET NEET Physics

## Explain how to use psedo force in a lift

**ashutosh25807**17th February 2018 7:08 AM

### ICSE XI Science

## Question - 1 : A stream of water flowing horizontally with a speed of 15 m/s gashes out of a tube of cross sectional area 10^-2 m^2 and hits a nearby vertical wall. Find the force exerted on the wall by the impact of water. Assume that water does not rebound from the wall. Take density of water to be 1 X 10^3 kg m^-3.

**sudhanshubhushanroy**25th February 2018 4:16 PM

### CBSE IX Physics

## Explain 28 with figure

**md775016**27th February 2018 9:41 PM

### CBSE XII Science Physics

## Kindly provide proper and complete solution with a plausible explanation.

**Varsneya Srinivas**1st March 2018 8:02 AM

### ICSE VIII Physics

## differentitate between 1)force and pressure 2)1pascal and 1 newton

**nathsantanukumar**23rd March 2018 7:18 PM

### CBSE XII Science Physics

## state the superposition principle for electrostatic force on a charge due to number of charges? using it obtain an expression for the total force exited on a point charge due to other two point charges.

**Balan**26th March 2018 12:58 PM

### ICSE VIII Physics Force and Pressure

## give two examples to prove that the smaller the area of contact,the greater the pressure

**nathsantanukumar**27th March 2018 5:16 PM

### CBSE XI Science Physics

## Find the resultant of the following forces acting at a point - 1) 100√2 dyne along north - east. 2) 980√2 dyne along north - west and 3) 2.0g wt along south.

**sudhirhanda144**22nd April 2018 3:17 PM

### CBSE VIII Science Force and Pressure

## A car comes in rest when its engine is switched off Name the Effect of force and agent.

**kumarbhupender127**4th May 2018 6:33 AM

### CBSE X Physics

## How much is the viscous drag acting on a rocket driven sled that is going at a constant speed against a frictional force of 22000 N when the thrust of the engine is 31000 N.

**acv27joy**6th May 2018 3:59 PM

### CBSE IX Physics

## A frictionless wagon is pushed, from rest, with a force of 60N for 14 seconds. If it then strikes a wall and comes to rest in 0.15 seconds, how much average force does the wall exert on the wall. GIVE WITH PROPER STEPS.

**acv27joy**6th May 2018 8:21 PM

### CBSE X Physics

## A 680 kg rocket is to be lifted off the surface of the moon, where g = 1.67 m/s^2. What force is required to give it an upward accleration of 2 m/s^2. GIVE WITH PROPER STEPS

**acv27joy**6th May 2018 8:25 PM

### ICSE IX Physics Laws of Motion

## what is the mathematical expression of newtons 3rd law of motion

**Priyankamajumder73**12th May 2018 12:26 PM

### JEE JEE (Main) Physics

## how shall i solve this numerical?please help!

**pukai7229**15th May 2018 10:24 AM

### CBSE X Physics

## A ball moving with a velovity v strikes a wall moving towards the ball with a velocity u. An elastic impact lasts for t seconds. Find the mean elastic force actiong on the block in terms of m,v,u and t.

**acv27joy**22nd May 2018 7:37 PM

### NEET NEET Physics

## A dipole with an electric moment p is at a distance r from a uniformly charged long thread find force acting on the dipole if vector p is oriented along the thread

**tandonyashika**5th June 2018 7:15 PM

### CBSE VIII Science

## Can you give me some idea for making a working model of force

**hmhomkar**6th June 2018 3:21 PM

### CBSE XI Science Physics

## In a particular system the units of length,mass and time are chosen to be 10cm,10g and 0.1s resp.The unit of force in this system will be equal to (A)0.1N (B)1N (C)10N (D)100N

**Harjeet.ghuman**9th June 2018 3:30 PM

### JEE JEE (Main) Physics

## instantaneous velocity of a body of mass 5kg is given v=(3tcube+2tsquare+25m/s)calculate the force experienced by the body at t=3sec

**puneetgarg2555**15th June 2018 7:27 PM

### CBSE XII Science Physics

## Find the force.

**pradeepjsme**27th June 2018 1:43 PM

### ICSE X Physics

## a bullet of mass 10 g travels with speed 500 m/s on striking a wooden target it penetrates 0.5 m inside calculate kinetic energy and resistive force

**Samrat**28th June 2018 11:41 AM

### ICSE X Physics

## A ball of mass 100 gram moving with a velocity of 20 m per second is brought to rest in 0.02 second find the average retarding force acting on the ball

**Samrat**29th June 2018 10:11 PM

### ICSE X Physics

## A bullet of mass 2g from moves with a velocity of the 300 metre per second it strikes a tree and penetrate to a depth of 5 cm before coming to rest what is the change in the bullets kinetic energy how much work does the tree do on the bullet what is the average retarding force of bullet

**Samrat**29th June 2018 10:24 PM

### ICSE X Physics

## A car initially at rest picks up a velocity of 72 km per hour in 20 seconds if the mass of the car is 1000 kg find Force developed by its engine and distance covered by car

**Samrat**29th June 2018 10:26 PM

### ICSE X Physics

## Cricket player holds a cricket ball of mass 100 grams by moving his hands back by 75 CM if the initial velocity of the ball is 108 km per hour find the retarding force applied by the player

**Samrat**29th June 2018 10:28 PM

### ICSE X Physics

## What extra force should an engine of a car developed such that its velocity change from 18 km per hour to 72 km per hour over a distance of 20 metre when mass of is 900 kg

**Samrat**29th June 2018 10:29 PM

### ICSE X Physics

## A cricket ball of mass 100 g moving with a velocity of 90 km per hour is brought to rest by a player by moving his hands back by 40 cm find impulse and time in which ball come to rest and force exerted by player

**Samrat**29th June 2018 10:38 PM

### CBSE X Physics

## A bullet of mass 40 gram moving with a velocity of 900 km per hour strikes a wooden target and comes to rest after penetrating 50 cm calculate loss in kinetic energy and average force of friction

**Samrat**30th June 2018 9:54 AM

### ICSE X Physics

## The valve of a cylinder containing 12 KG of compressed gas is opened and the cylinder empties in 1 minute 30 seconds if the gas comes out from the exit nozzle with an average velocity of 15 M per second find the force exerted on the cylinder

**Samrat**30th June 2018 7:04 PM

### ICSE X Physics

## A car along with passengers weighs 2000 kg it accelerates from 36 km per hour to 90 km per hour in 10 seconds calculate a.acceleration b. Distance covered by car while accelerating c. momentum of car after 10 second d.force developed by the engine of car e.Total energy expanded during accelerationf. power of the engine in Kilowatt

**Samrat**30th June 2018 7:18 PM

### ICSE X Physics

## A machine is driven by a 100 kg mass that falls 8 m in 4 seconds it lifts a load of 500 kg vertically upwards a.what is the force in Newton exerted by falling mass b.what is the work done by 100 kg mass falling through 8 m c. what is the power input to the machine d. If the efficiency of the machine 75% what is the power output of the machine e.what is the work done by the machine in 4 sec

**Samrat**30th June 2018 7:24 PM

### ICSE X Physics

## A body of mass 20 kg falls from a height of 78.4 m to the ground and rebounds to a height of 19.6 M if the ball made contact with the ground for one fifth of a second hand force in KGF exerted by the ground on the body

**Samrat**30th June 2018 9:12 PM

### ICSE X Physics

## Jet fighter of mass 10000 kg has it take off velocity of 200 m per second in a distance of 1000 M find the force developed by the engine and its power at the take off

**Samrat**30th June 2018 9:14 PM

### ICSE X Physics

## cricket bail weighing 200 gram and moving with a velocity of 1 M per second is hit for 0.5 second in such a way that it returns in opposite direction with same velocity find the average force with which the blow is struck

**Samrat**30th June 2018 9:30 PM

### ICSE X Physics

## Cricket ball weighing 200 gram Rises to a vertical height of 26 m and drops vertically into a fielders hand when 1.5 m above the ground the fielder brings it to rest in 1 /10 seconds calculate the velocity of ball as it reaches the fielders hand b.the average force that must be applied in stopping it

**Samrat**30th June 2018 9:33 PM

### CBSE VIII Science Force and Pressure

## what will happen to abody in vaccum if force applied on it?

**arajeevshashank**7th July 2018 6:48 PM

### JEE JEE (Main) Physics

## Two smooth cylindrical bars weighing W each lie next to each other in contact .A similar third bar is placed over the two bars .Neglecting friction the minimum horizontal force on each lower bar necessary to keep them together is

**m.nilu**10th July 2018 11:45 AM

### JEE JEE (Main) Physics

## Could you please solve this numerical!!

**pukai7229**10th July 2018 8:08 PM

### JEE JEE (Main) Physics

## kindly solve (ref. 522)

**arup.isro**12th July 2018 11:12 PM

### JEE JEE (Main) Physics

## kindly solve (ref. 629)

**arup.isro**12th July 2018 11:13 PM

### JEE JEE (Main) Physics

## Four blocks with masses 4kg,3kg,2kg,1kg are pulled along a smooth horizontal surface. The masses of the blocks and tension in one cord are given. The pulling force F is

**m.nilu**16th July 2018 9:57 PM

### JEE JEE (Main) Physics

## A block of mass m is pulled on the smooth horizontal surface with the help of two ropes each of mass m, connected to the opposite faces of the block. The forces on the ropes are F and 2F. The pulling force on the block is

**m.nilu**16th July 2018 10:00 PM

### JEE JEE (Main) Physics

## A uniform rope of mass 2kg which can tolerate max tension 80N at any pt ,find max value of F which can be applied on 2kg block.

**m.nilu**19th July 2018 9:00 AM

### ICSE VII Physics Motion

## Why an athlete land on sand after taking a long jump?

**drsakuntalagogoi**25th July 2018 9:48 PM

### JEE JEE (Main) Physics

## Two blocks are kept in contact as shown.Find (surfaces in contact are smooth) (a) forces exerted by floor on 20kg.(b) contact force bet two blocks.

**m.nilu**29th July 2018 10:59 PM

### ICSE VIII Physics Energy

## When does a force do work

**Manjokumargupta8084**31st July 2018 4:42 PM

### JEE JEE (Main) Physics

## In the given situation wedge is moving towards right with an acceleration 5m/s^2 with the help of external force F.(m=1kg).Find acceleration of sphere,normal between sphere and wedge, and value of F.

**m.nilu**3rd August 2018 10:24 AM

### NEET NEET Physics

## If the units of length and force are increased by four times the unit of energy will be increased by

**valavanvino1011**14th August 2018 4:21 AM

### JEE JEE (Main) Physics

## Consider the arrangement shown in fig.Friction coefficient for all the surfaces are shown in fig.and the rod connecting two upper blocks is horizontal.What is the minimum value F so that the rear two blocks start sliding with each other

**m.nilu**14th August 2018 10:26 PM