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## define equations of motion

Asked by 1st March 2008 3:25 PM

## do we hav to know the derivation of eqn of motions from exam question point of view

Asked by AMOGH 15th March 2008 7:36 PM

## another quest. a small steel ball is dropped from a height of 2.5m into glycerin jar. it hits the surface of glycerin with certain velocity and sinks into the bottom by losing its 20% of its velocity at the surface. if the time taken to reach the bottom after it si dropped is 2 sec. and velocity in glycerin is lost at constant rate, then fiind the average velocity of the ball of journey

Asked by vedant sharma 6th October 2014 12:10 PM

## A ball thrown vertically upwards with a speed of 9.6m/s from the top of a tower retuns to the earth in 6sec .Find height of the tower.

Asked by JAIBHARGAVA200 14th October 2014 2:19 PM

## A lift whose cage is 3 m high is moving up with an acceleration of 2m/s2. A piece of stone is dropped from the top of the cage of the lift when its velocity is 8m/s. if g =10m/s2 then the stone wil reach the floor of the lift after how much time?

Asked by Saptarshi Sen 19th April 2015 2:01 PM

## A body thrown vertically upwards from top of a building reaches the foot of the building in 5 sec;but it will take only 2 secif thrown vertically down with the same velocity.Calculate the height of the building.Given g=9.8m/sec^2.

Asked by Benjamin 19th September 2015 5:43 PM

## A train starts from rest and moves with a constant acceleration 'a'. The guard of the train reaches the end of the platform with a speed 'v' and a passenger exactly in the middle of the train reaches the end of the platform with a speed 'u'. Determine hte speed with which a passenger seated mid-way between the guard and the passenger mentioned earlier, crossed the platform. Express it in the form of 'v'.

Asked by bjayanta 4th May 2016 3:58 PM

## A rocket is fired upwards from earth's surface such that it creates an acceleration of 20 m/sec ^2 . If after 5 sec its engine is switched off, the maximum height of the rocket from earth's surface will be ?

Asked by Balbir 14th May 2016 4:40 PM

## A vehicle moving with a speed of 36km/hr see a red light ahead and applies breaks and stops after covering 10m distance on a moving. Another vehicle moving  at a speed of 72km/hr and applying breaks it stops after covering 30m distance. Assuming same reaction time and same deceleration in each case what is the distance covered before stopping when breaks are applied on the vehicle when it is moving at a speed of 54km/hr

Asked by Hrishikesh marathe 13th June 2016 7:11 AM

## A particle moving in straight line experience constant acceleration for 20 second after starting from rest. If it travel a distance S1 in the first 10 seconds and distane S2 in the next 10 seconds then find the relation between S1 and S2

Asked by Hrishikesh marathe 13th June 2016 7:35 AM

## Sir/mam  Can you please find the derivative dx/dt in the following question no. 8  (i) and  write the steps involved ?

Asked by Varsneya Srinivas 26th June 2016 6:22 PM

## A car running at a speed of 72 km/hr is slowed down to 18 km/hr over a distance of 40 m.Calculate :(1) the retardation produced by the brakes.(2)time for which brakes are applied?

Asked by nisha_vini29 3rd July 2017 12:24 PM

## a stream 200m broad is running downward at the rate of 1 km/h .a swimmer who can swim at the rate of 2 km/h wishes to reach a point just opposite . along what line should he striker and how long will he taker is crossing ?

Asked by hrushikesh.barik 11th October 2017 8:16 PM

## A boy on a cliff 49 m high drops a stone. One second later, he throws a second stone after the first. They both hit the ground at the same time. With what speed he throw the second stone ?

Asked by pratikoke20 31st October 2017 5:58 PM

## ques no 9

Asked by chandanbr6004 15th November 2017 9:36 PM

## ques no 10

Asked by chandanbr6004 15th November 2017 9:40 PM

## Solve this

Asked by venkat 25th December 2017 8:59 PM

## Solve this

Asked by venkat 25th December 2017 9:05 PM

## A ball is dropped on the floor from a height of 10 metre rebounds to a height of 2.5 M if the ball is in contact with the floor for 0.01 seconds what is the average acceleration during contact

Asked by www.naresh 4th February 2018 7:28 AM

## The 2 ends of train ,moving with a constant acceleration,pass a certain with velocity u and v .Show that velocity with which the middle point of train passes the same point is root of(usquare +v square)/2

Asked by ajaysekharjs 27th August 2018 11:54 AM

## IF A CAR start from rest and TRAVEL WITH CONSTANT acceleration for 10 second.find the ratio of distance in 1st and 2nd second  travel by car?

Asked by er.arunnegi 19th December 2018 7:34 AM

## A ball is thrown up with a certain velocity so that it reaches a height h. Find the ratio of times in which it is at h/3.

Asked by devigeetha531 8th January 2019 4:37 PM

### CBSE XI Science Physics Motion in a Straight Line

Asked by lovemaan5500 17th January 2019 6:08 AM

## 13th sum plz

Asked by lovemaan5500 17th January 2019 6:09 AM

### ICSE XI Science Physics

Asked by lovemaan5500 17th January 2019 6:10 AM