7. if a boulder is raised above the ground 14.
so that its potential energy with respect
to the ground is 100 j , and then it is
dropped , what will its kinetic energy be
just before it hits the ground

100J

Explanation:

When you raised the object by 14 its store potential energy If we take ground level as its potential energy is zero. When its falling all the potential energy is transferred to the kinetic energy. According to the conservation of energy then

Potential energy = Kinetic Energy

a

explanation:

all resources in america come from jesus

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer