Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETPhysicsCenter of Mass, Momentum and Collision

A time varying force acts on a ball of mass 100   g for 2   ms . The force versus time curve is shown below. If the initial speed of the ball is 10   m   s - 1 , then the speed of ball after 2   ms is

Options

  1. A410   m   s - 1
  2. B210   m   s - 1
  3. C200   m   s - 1
  4. D400   m   s - 1

Correct answer

B. 210   m   s - 1

Step-by-step solution

As we know, impulse = area under F-t graph. Therefore, Impulse = 1 2 × 2 × 10 - 3 × 20 × 10 3 = 20   kg   m   s - 1 Also, impulse is equal to change in momentum of the particle, ∆ p = impulse ⇒ m v - m u = 20 ⇒ v = 20 m + u = 20 0 . 1 + 10 = 210   m   s - 1

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