Question

A body of mass 4kg is moving with a velocity of 108km/h . find the kenetic energy of the body.​

Answer 1

KE = 2800 J

Step-by-step explanation:

Usually a velocity is expressed as m/s. Then the energy units are joules.

`(108 km)/(hr) * (1000m)/(1 km) * (1 hour)/(3600 seconds) =(108*1000 m)/(3600sec)`

v = 30 m / sec

KE = 1/2 * 4 * (30)^2

KE =2800 kg m^2/sec^2

KE = 2800 Joules