Question

A body of mass m moving with a speed v has kinetic energy Ek. A body of mass 2m moving with the same speed will have a kinetic energy…………..

Answer 1

Answer:

Ek÷2

Explanation:

K.E=0.5×2m×v²

take this as first condition

K.E=0.5×m×v²

take this as second condition

now do first condition by second condition

Ek÷K.E= 0.5 × 2m×v²÷(0.5×m×v²)

Ek÷2=K.E