AP EAMCET · PHYSICS · Center of Mass Momentum and Collision
A ball of mass , moving with a speed of , strikes a wall at an angle (as shown in figure). The ball rebounds at the same speed and remains in contact with the wall for ; the force exerted by the ball on the wall is: 
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
Change in momentum, ∆p=m∆v ⇒∆p=3100cos30° ⇒∆p=3×2×100×32 ⇒∆p=3003 ∆F=∆p∆t ⇒∆F=30030.2=15003 N
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