Question

a car of mass 1200kg is moving with 90kmph. the kinetic energy is
a)3 x 10^8
b)2 x 10^5
c)3 x 10^5

Answer 1

Explanation:

mass(m) = 1200kg

moving with velocity (v) = 90km/h= 90000m/hr

= 90000/3600 m/s = 25 m/s

we know kinetics energy = 1/2 m v²

= 1/2 × 1200 × 25²

= 600 × 625

= 375000

= 3.75 × 10⁵ kg m/s

= 3.75 ×10⁵ joule