100 x = 50*12
x is 6
the ball went right so the person goes left
It is that conservation of momentum thing.
A stationary 100-kg person is initially holding a 50-kg ball while standing on a skateboard. The person throws the ball to the right, and the ball moves (with respect to the ground) with a speed of 12 m/s. The person on the skateboard ____________.
A. moves to the left with a speed of 6 m/s
B. moves to the left with a speed of 4 m/s
C.remains stationary
D.moves to the left with a speed of 12 m/s
1 answer