Posted by **bram** on Monday, March 28, 2011 at 5:08pm.

While standing on a frictionless ice surface, a 50 kg skater pushes against a wall with an average force of 150 N west for 0.210 s. Calculate the velocity of the skater at 0.210 s.

This was what i did:

m = 50 kg

Fnet = 150 N

t = 0.210 s

Vf =?

Fnet = ma

Fnet/m = a

150 N/50 kg = 3 m/s^2

a = Vf-Vo/t

at - Vo = Vf

3m/s^2/0.210 s = 0.63 m/s west

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