343 meters per second Is the answer
W=mgh
W=(6)(9.8)(4)
W= 235.2J
Thiết bị không phải nguồn điện:
Đáp án D
Momentum would be the same before and after the collision
Before the collision:
Momentum of the single cart: 1 * 0.50 = 0.50
After the collision
velocity = 0.25m / s
1 * 0.25 + 1 * 0.25 =
0.25 * (1 + 1) =
0.25 * 2 =
0.50
Now new momentum will be 0.5
answer
the same before and after the collision
