Question

An object of mass m and velocity v has kinetic energy 200 joules. Find new kinetic energy if the mass of the object becomes double and the velocity remains the same. ​

Answer 1

Answer:

New Kinetic energy is 400J

Explanation:

KE =(1/2) mv^2 =200J

Given m is doubled and velocity becomes same

Hence KE(new) = (1/2)(2m)v^2

= 2 (1/2)mv^2= 2KE

= 2*200 =400J

New kinetic energy is 400J