Question

A car of mass 800 kg initially at rest is accelerated at the rate of 4ms^-2. The kinetic energy of the car after 5 seconds is ?​

Answer 1

Step-by-step explanation:

velocity after 5 seconds is 4 x 5 = 20 m/s

KE formula = 0.5mv²

= 0.5 x 800 x 400

= 400²

= 160000 J

or, 160kJ