WAEC - Physics (2004 - No. 16)
A force acting on a body causes a change in the momentum of the body from 12kg ms-1 to 16kg ms-1 in 0.2s. calculate the magnitude of the force
140.0N
20.0N
4.0N
0.8N
解释
F = \(\frac{mv - mu}{t} = \frac{16 - 12}{0.2} = 20N\)