Question

Solve the Following.

1. Calculate the kinetic energy of a ball of mass 100g going with a speed of 20 m/s.

2. A stone of mass 500g is raised from a height of 2m to 4m. Find the change in its

potential energy.​

Answer 1

Answer:

1) 20000 J

2) 9800 J

Step-by-step explanation:

1) K.E = 1/2 mv² = 1/2 * 100 * 20² = 20000J

2) P.E.= mgh = 500 * 9.8 * (4-2) = 9800 J