Question

A 4.00 kg rock is rolling 10.0m/s find its kinetic energy

Answer 1

Kinetic Energy = (1/2)mv²

Where m = mass in kg, v = velocity in m/s, Kinetic Energy is in Joules

Kinetic Energy = (1/2)mv²
 
                         = (1/2)*4*10²            . Use your calculator.
      
                         = 200 Joules