4. Calculate the speed of a 2.81 kg object that has a kinetic energy of 45.0 J.

Question

. Calculate the kinetic energy of a 0.347 kg object moving with a speed of 2.44 m/s.

4. Calculate the speed of a 2.81 kg object that has a kinetic energy of 45.0 J.

5. 938 J of net work are done on a 0.366 kg moving object. After the work was done, the

    object has a speed of 85.2 m/s. What was its speed before the work was done?

Answer 1

m=2.81 kg

K=45 J

K= 1/2mV^2

V= srq root (2K/m)

V= 5.65 m/s (as an answer)