Question

find the kinetic energy of momentum of the body is 40 kg/m2 and m=25g​

Answer 1

Answer:

Momentum = mass × velocity

0.4 = 0.025 × v

V = 0.4/0.025

V = 16 m/s

To find the kinetic energy ,

KE = 1/2 m v^2

= 1/2 × 0.025 × 16 × 16

= 3.2 J

Hence

the kinetic energy=3.2 N

Answer 2

Answer:

Given,

Mass=40kg,v=1m/s,v=2m/s

According to the work-energy conversion theorem;

Work done by the force= Change in Kinetic energy,

Work done by the force =(

2

1

)×m×(v

2

−u

2

)

Work done =0.5×40×(4−1)=60J