Answer: 0.16s
Explanation:
Given the following :
Average spring force by the racquet (F) = 225N
Change in momentum = 35kgm/s
To determine the change in interaction time; that is the momentary for e acting in the tennis ball ( impulse)
Recall:
F = mass(m) × acceleration(a)
Acceleration (a) = change in Velocity with time
a = change in V / time(t)
F = m * change in V / t
Ft = m* change in v
Recall m* change in v = momentum
Ft = change in momentum
225 * t = 35
t = 35 / 225
t = 0.1555555
t = 0.16s
