A 32.0kg crate is initially moving with a velocity that has magnitude 3.92m/s in a direction 37.0 ∘ west of north.How much work must be done on the crate to change its velocity to 5.50m/s in a direction 63.0 ∘ south of east?

Answer 1

You are given an initial KEnergy, a final KE, and looking for the added energy.

initial KE + added work=finalKE
Notice it does not depend on direction, or time.

1/2 m 3.92^2+work=1/2 m 5.5^2
solve for work. mass m is given.

Answer 2

238