R
Rachel N
Guest
A tennis ball of mass 57 g is initially at rest. While being hit, it experiences an average force of 55 N during a 0.13-s interval. What is it's final velocity?
I converted 57 g to kg:
.057 kg
Then avg. F = m(avg. a)
55 = .057 (avg. a)
avg. a = 964.9 m/s^2
Then to find vf, I used a = change in v / change in t:
964.9 = (vf - 0) / (.13 - 0)
vf = 125 m/s
Am I doing this correctly and is my answer right? If not, can you help me do it right?
I converted 57 g to kg:
.057 kg
Then avg. F = m(avg. a)
55 = .057 (avg. a)
avg. a = 964.9 m/s^2
Then to find vf, I used a = change in v / change in t:
964.9 = (vf - 0) / (.13 - 0)
vf = 125 m/s
Am I doing this correctly and is my answer right? If not, can you help me do it right?