Question

a body of mass 50kg has momentum of 3000kg-m/s . then it's kE is?​

Answer 1

Answer:

m = 50 kg, p = 3000 kg ms-1  

Since  p = mv

∴  v = p/m = 3000/50 = 60ms-1  

Kinetic energy of the body = 1/2mv2  

= 1/2 x 50 x (60)2 = 25 x 3600

= 90000 J

Explanation:

Answer 2

Answer:(i) m = 50 kg, p = 3000 kg ms-1  

Since  p = mv

∴  v = p/m = 3000/50 = 60ms-1  

Kinetic energy of the body = 1/2mv2  

= 1/2 x 50 x (60)2 = 25 x 3600

= 90000 J

(ii) Velocity of the body v = 60 ms-1