Find the kinetic energy (in J) possessed by a body of mass 20 kg moving with a velocity of 4 m/s.
- A40
- B120
- C160
- D80
Solution & Step-by-step Explanation
Kinetic energy (KE) formula is given by:
KE=
2
1
mv
2
Given:
Mass, m=20kg
Velocity, v=4m/s
Substitute values into formula:
KE=
2
1
×20×(4)
2
KE=10×16=160J
KE=
2
1
mv
2
Given:
Mass, m=20kg
Velocity, v=4m/s
Substitute values into formula:
KE=
2
1
×20×(4)
2
KE=10×16=160J