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?
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...