Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2006PhysicsCenter of Mass, Momentum and CollisionActual

A 0.5 ~kg ball moving with a speed of 12 m / s strikes a hard wall at an angle of 30^ with the wall. It is reflected with the same speed at the same angle. If the ball is in contact with the wall for 0.25 seconds, the average force acting on the wall is:

Options

  1. A96 ~N
  2. B48 ~N
  3. C24 ~N
  4. D12 ~N

Correct answer

C. 24 ~N

Step-by-step solution

Applying law of conservation of momentum. Change in final momentum = initial momentum m v after collision -(-m v ) before collision aligned & f t= change in momentum =2 m v & f= 2 m v t aligned Putting the values we get, aligned f= & 2 0.5 12 30^ 0.25 & =24 ~N . aligned

Practice Center of Mass, Momentum and Collision on Quantrex Academy →

More from Center of Mass, Momentum and Collision

A frictionless circular wire of unit radius is fixed on the horizontal plane. Two point particles of unit mass start moving simultaneously from point A ( = 2 ) with identical unifo 2026Bob B of mass m at rest is hanging vertically from the ceiling via a massless string of length 10 m, as shown in the figure. Point mass A of mass m travelling horizontally with spe 2026A ball of mass 0.5 kg is dropped from a height of 40 m . The ball hits the ground and rises to a height of 10 m . The impulse imparted to the ball during its collision with the gro 2025Two bodies A and B of same mass undergo completely inelastic one dimensional collision. The body A moves with velocity v₁ while body B is at rest before collision. The velocity of 2024Two particles A and B initially at rest, move towards each other under mutual force of attraction. At an instance when the speed of A is v and speed of B is 3 v , the speed of cent 2023A 1 ~kg object strikes a wall with velocity 1 ~ms ⁻¹ at an angle of 60^ with the wall and reflects at the same angle. If it remains in contact with wall for 0.1 ~s , then the force 2023A bullet of mass m hits a block of mass M elastically. The transfer of energy is the maximum, when 2023A shell of mass m is at rest initially. It explodes into three fragments having mass in the ratio 2 : 2 : 1 . If the fragments having equal mass fly off along mutually perpendicula 2022 Full Center of Mass, Momentum and Collision list All NEET PYQs