A body of mass 2kg is thrown vertically upwards with an initial veloci

1.	A body of mass 2kg is thrown vertically upwards with an initial velocity of 20 m/s. What will be its potential energy at the end of 2s?
Answer» Mass of the body, m = 2kg Initial velocity, u = 20 m/s Acceleration due to gravity, g = 10 m/s² Height reached = h Time, t = 2 s Using second equation of motion, h = ut = 1/2 gt² h = 20m PE after 2 s = mgh = 400J

A body of mass 2kg is thrown vertically upwards with an initial velocity of 20 m/s. What will be its potential energy at the end of 2s?

Answer»

Mass of the body, m = 2kg

Initial velocity, u = 20 m/s

Acceleration due to gravity, g = 10 m/s²

Height reached = h

Time, t = 2 s

Using second equation of motion,

h = ut = 1/2 gt²

h = 20m

PE after 2 s = mgh = 400J