Question

an object of mass 10 kg is raised to a height of 15m,Find potential energy possesed by the object at that height .find new P.E.(a) if the sameobject raised half of original.(b) same raised to three times of original ?(g=10m/sec 2

Answer 1

Explanation:

given:

m= 10kg

h= 15m

g= 10 m per sec²

To find

a:P.E if height is half of original

b: P.E if height is three times of original

solution:

P.E= mgh

a:

in case a

P.E= mg×1/2h

P.E= 10×10×1/2×15 kg m² per sec ²

P.E=750 Joules

b;

in case b

P.E= mg3h

P.E=10×10×3×15 kg m² per sec²

P.E=4500 Joules