Question

A body of mass 3kg is thrown vertically upward with an initial velocity of 15 m/s. Calculate the potential energy at the end of 2s.

Answer 1

Answer:

Explanation:Given ,

Mass of body ,m=2 kg

Initial velocity u=20m/s

Height reached at t=2secs h=ut−

2

1

​

gt

2

⟹h=20×2−

2

1

​

×10×2

2

⟹h=20 m

Potential energy , P=mgh=2×10×20=400 J