A 1.0 kg ball moving at 2.0m/s perpendicular to a wall rebounds from the wall at 1.5m/s. The change in the momentum of the ball is:
Correct answer: D. 3.5 N s away from wall
- A. Zero
- B. 0.5 N s toward wall
- C. 0.5 N s away from wall
- D. 3.5 N s away from wall
Explanation
Pi= mvi= (1)(2) = 2 N s Pr=mvf=(1)(-1.5) =- 1.5 N s △P = mvf - mvi = - 1.5 - 2 = - 3.5 N s
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Force and Motion
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
Practise Force and Motion
1,416 free Force and Motion MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Force and Motion questions
A car moving with an initial velocity of 25 m/s north has a constant acceleration of 3 m/s2 south. After 6 s its velocity will be:
In projectile motion the
The variation of force acting on a body with tie is shown What is the change in momentum of body after 4s?
Which vehicle has an acceleration of 5 m/s2?
If it is projected at an angle of 35o, It hits certain target. It will have the same range if it is projected at an angle of:
A train of length 150m is going north with a speed of 10ms-1. A parrot flies 5ms-1 toward the south parallel to the railway line. The time taken by the parrot to cross the train is: