A ball of mass 1 kg collides with a wall with speed 8 ms -1 and rebounds on the same line with the same speed. If mass of the wall is taken as infinite, the work done by the ball on the wall is

Question

A ball of mass 1 kg collides with a wall with speed 8 ms -1 and rebounds on the same line with the same speed. If mass of the wall is taken as infinite, the work done by the ball on the wall is (A) 6 J (B) 8 J (C) 9 J (D) zero

Tardigrade Admin · Accepted Answer

Here the force acts and point of application of force does not move. ⇒ W=F s cos θ=F(0) cos θ=0

Q. A ball of mass $1 k g$ collides with a wall with speed $8 m s^{- 1}$ and rebounds on the same line with the same speed. If mass of the wall is taken as infinite, the work done by the ball on the wall is

6 J

8 J

9 J

zero

Here the force acts and point of application of force does not move.
$\Rightarrow W = F s cos θ = F (0) cos θ = 0$

Q. A ball of mass 1kg collides with a wall with speed 8ms−1 and rebounds on the same line with the same speed. If mass of the wall is taken as infinite, the work done by the ball on the wall is

6 J

8 J

9 J

zero

Here the force acts and point of application of force does not move. ⇒W=Fscosθ=F(0)cosθ=0

Q. A ball of mass $1 k g$ collides with a wall with speed $8 m s^{- 1}$ and rebounds on the same line with the same speed. If mass of the wall is taken as infinite, the work done by the ball on the wall is

Here the force acts and point of application of force does not move.
$\Rightarrow W = F s cos θ = F (0) cos θ = 0$