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## Homework Statement

A 5.75 kg object passes through the origin at time t = 0 such that the x component of velocity is 5.00 m/s and its y component of velocity is -3.00m/s.

a) what is the kinetic energy of the object at this time?

b) at t = 2.00s, the particle is located at x = 8.50m and y = 5.00m. What constant force acted on the object during this time interval?

## Homework Equations

Change in K = Kfinal - Kinitial

where K = 1/2 * m * v^2

W= force * displacement

## The Attempt at a Solution

I got part a by finding the magnitude of the object's velocity then plugging my known values into the K = 0.5mv^2 equation. I got my answer to be K = 97.8J at t=0.

I'm a bit lost on what to do for part b though...