Question

Numericals
1. A stone of mass 500 g is raised from a height
of 2 m to 4 m. Find the change in its potential
energy
2. Calculate the kinetic energy of a ball of mass
100 g moving with a speed of 20 ms^-1


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Answer 1

Explanation:

1) change in its potential energy =mgh

=500(4-2)=500x2=1000=1x10*4

2) kinetic energy =1/2 mv²

1/2x100x(20)²

50x400

2000 is the answer of this question

Answer 2

Explanation:

I hope that this answer will help you