A bullet of mass 100 g has shot a speed of 108 km/hr towards the target. What would be its kinetic energy?
The correct option is
A
45 J
The mass of the bullet is 100 g and the speed of the bullet is 108 km/hr
K.E.=12mv2, where m is the mass of the bullet and v is the speed of the bullet.
Given, m =100 g = 0.1 kg
v=108km/hr=108×518= 30 m/s
K.E.=12mv2 = 12×0.1×302=45 J