Calculate the potential energy of a 1200 kg boulder on a cliff 45 m above the ground.

Explanation:

Given mass of the object is 1200kg and it's placed at a height of 45m above the ground. As we know that potential energy is ,

where,

Substituting the respective values ,

Multiply ,

Hence the potential energy is 540000J .

I hope this helps.

i think it is non rem sleep

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s