A bullet of mass 20g is found to pass two points 30m apart in 4 s? Assuming the speed to be constant, find its kinetic energy?

Answer

B

Explanation

Uniform velocity of the bullet, `upsilon = ("distance convered")/("time taken") = (30m)/(4s) =.5m//s`
`"mass of bullet"`, `m =20g =0.02kg`
`KE "of the bullet" =(1)/(2)mupsilon^2 =(1)/(2)(0.02kg)(7.5m//s)^2 =0.5625J`