CBSE IX Physics Force and Laws of Motion
How to derive the equation of law of conservation of momentum ?
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26th February 2008
5:35 PM
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CBSE IX Physics Force and Laws of Motion
2 bodies of masses 'm' and '3m', moving with velocities 3v and v respectively along same direction, collide with each other. After collision they stick together and move with a velocity V in the same direction. Then:
A) V=v
B) V=3/2v
C)V=2v
D) V=4/3v
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12th October 2017
11:39 PM
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CBSE IX Physics Force and Laws of Motion
A bullet weighing 50 grams leaves the gun with a velocity of 30m/s. The ratio of momentum of the bullet to the gun is what?
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27th November 2017
8:10 PM
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NEET1 ALL Class Motion of System of Particles and Rigid Body System of Particles
Q.
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16th December 2017
6:45 AM
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JEE Plances JEE (Main) Physics
state the law of conversation of linear momentum.derive it from the newton's second law of motion
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5th March 2018
7:26 PM
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CBSE X Physics
A man weighing 80 kg is standing in a trolley weighing 320 kg. The trolley is resting on frictionless horizontal rails. If the man starts walking on the trolley with a speed of 1m/s, then after 4 second his displacement relative to the ground will be :- a)5 m. b)4.8 m c)3.2m d)3 m
Asked by acv27joy
25th May 2018
10:12 PM
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NEET1 NEET1 Physics
A particle of mass 'm' moving towards the east with speed 'v' collides with another particle of same mass and same speed 'v' moving towards the north. If the two particles stick to each other, the new particle of mass 2m will have a speed of?
Asked by nasir.mirza
13th June 2018
10:47 PM
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JEE Plances JEE (Main) Physics
Please help me to do this
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10th July 2018
11:28 PM
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CBSE IX Physics
An empty rail carof mass 100kg is at rest on the railway track. A boy of mass 40kg running with a speed of 5m/s jumps on the rail car. The speed of the (car + boy )system is how much
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14th September 2018
11:09 PM
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CBSE XI Science Physics
A body of mass 1 kg is initially at rest, explodes and breakers into three fragments of masses in the ratio 1:1:3. The two fragments of equal masses fly off perpendicular to each other with a speed of 30m/s each. What is the velocity of the heavier fragment ? Ans. 14.1m/s, at an angle of 135° relative to the second fragment
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18th October 2018
4:04 PM
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CBSE XI Science Physics
In a rocket, the mass of the fuel is 90℅ of the total mass. The exhaust gasses are ejected at a speed of 2km/s. Find the maximum speed attained by the rocket with diagram. Neglect gravity and air resistance and take the initial speed of the rocket to be zero. (Given, log e 10 = 2.3)
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18th October 2018
4:13 PM
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CBSE XI Science Physics
Derive third law of motion by using the law of conservation of linear momentum
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7th March 2019
7:50 PM
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CBSE XII Science Physics
Hye .I want u to tell me the correct option .
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29th April 2019
6:17 PM
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ICSE XI Science Physics
a 20g ball hits a wall at 45º angle with a speed of 15m/s and rebounds perpendicular to the direction of incidence with same speed .Find the impulse received by the ball
Asked by SUMITA
24th May 2019
9:19 AM
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CBSE IX Physics Force and Laws of Motion
a bullet of mass 10 g is fired at a speed of 10 m/s-1 from a gun of a mass of 4 kg. what is the recoil velocity of the gun?
Asked by ujjawalraj95049
3rd July 2019
10:51 PM
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Maharashtra IX Physics
Bullet having a mass of 10 gram and moving with a speed of 1.5 metre per second penetrates a thick wooden plank of mass 900 gram the plank was initially at rest the bullet gets embedded in the plank both andmove together determine their velocity.
Asked by Umeshkhewalkar02
5th July 2019
9:43 AM
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CBSE IX Physics Force and Laws of Motion
Two objecrts, each of mass 1.5kg, are moving in the same straight line but in opposite directions. The velocity of each object is 2.5m/s before the collision during which they stick together. What will be the collision?
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9th July 2019
9:21 AM
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CBSE X Physics
a balloon is inflanted and released, does it fly forward as the air escape?
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25th July 2019
4:02 PM
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JEE Main Physics
A car loaded with sand is moving with spped v .a hole is present at bottom of car through sand is falling continuously.then after time t velocity of car is increase or decrease
Asked by ashutosharnold1998
31st August 2019
12:34 AM
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CBSE IX Physics Force and Laws of Motion
The mass of a cannon is 500 kg. From this cannon a bullet of 10 kg mass was thrown at a speed of 20 m / s. How long does a cannon retreat if the resistance of the land is one tenth the weight of the cannon?
Asked by asishsengupta51
20th February 2020
11:24 AM
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NEET NEET Physics Laws of Motion
A butter hits the block kept on a horizontal frictionless surface and get embedded into it which of the following does not change
Asked by zamiraroshan
4th April 2020
12:10 PM
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CBSE IX Physics Force and Laws of Motion
please answer fast
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16th July 2020
5:39 PM
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CBSE IX Physics Force and Laws of Motion
vehicle stops on applying brakes does this phenomena violate the principle of conservation of momentum momentum momentum
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20th July 2020
4:20 PM
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CBSE IX Science
a bullet of mass 50g is fired using pistol of mass 1.5 kg experience 5m/s recoil speed what is the speed of bullet speed
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28th September 2020
5:55 PM
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CBSE IX Physics Force and Laws of Motion
A girl of mass 40 kg jumps with a horizontal velocity of 5m/s onto a stationary cart with frictionless wheels.The mass of the cart is 3 kg.What is her velocity as the cart starts moving?Assume that there is no external unbalnaced force working in the horizontal direction.
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28th October 2020
12:44 PM
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CBSE IX Physics Force and Laws of Motion
Two hockey players of opposite teams, while trying to hit a hockey ball on the ground collide and immediately become entangled. One has a mass of 60 kg and was moving with a velocity 5.0 m s–1 while the other has a mass of 55 kg and was moving faster with a velocity 6.0 m s–1 towards the first player. In which direction and with what velocity will they move after they become entangled? Assume that the frictional force acting between the feet of the two players and ground is negligible.
Asked by sasikumarsarala2020
25th June 2021
4:37 PM
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CBSE IX Physics Force and Laws of Motion
a bullet of mass 20 grams is horizontally fired with a volicity of 150 mls from pistal of mass 2 kg what is the recoil volicity of pistal
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28th June 2021
10:30 AM
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CBSE XI Science Physics System of Particles and Rotational Motion
can we say that if a body's centre of mass is at rest then its linear momentum is always conserved? please support the doubt with a suitable example...
Asked by yashrajgharte24.12dgatl
4th August 2021
9:45 PM
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NEET NEET Physics Laws of Motion
A gun of mass M fires a shot of mass m.the ratio of energy of recoil of the gun to the energy of the shotis
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19th October 2021
9:43 PM
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CBSE IX Physics Force and Laws of Motion
A boy of mass 45 kg running 6 m/s jumps onto a 30 kg trolley moving in the same direction at 1.5 m/s. Their common velocity will be: A. 4.0 m/s B. 4.2 m/s C. 6.5 m/s D. 8.3 m/
Asked by nishitatrambadia
21st October 2021
9:38 AM
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ICSE IX Physics Laws of Motion
state the laws of conservation
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13th November 2021
11:04 AM
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NEET NEET Physics Laws of Motion
phy
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28th April 2022
5:18 PM
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CBSE XI Science Physics
answer
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20th December 2022
10:44 AM
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JEE Main Physics Kinematics
As shown in Figure, a bullet weighs 0.3 N and moving with a velocity of 400 m/sec hits centrally a 30 N block of wood moving away at 15 m/sec and gets embedded in it. Find the velocity of the bullet after the impact and the amount of kinetic energy lost.
Asked by theavengers0203
22nd May 2023
11:54 PM
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JEE Main Physics Work, Energy and Power
A wooden block weighing 80 N rests on a rough horizontal plane, the coefficient of friction between the two being µ=0.4. If a bullet weighing 0.4 N is fired horizontally in to the block with muzzle velocity v= 500 m/s, how far will the block be displaced from its initial position? Assume that the bullet remains inside the block.
Asked by theavengers0203
24th May 2023
8:40 AM
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NEET NEET Physics Kinematics
answer this question
Asked by rkr112744
31st January 2024
11:18 PM
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