an initially stationary 15.0kg crate of cheese wheels is pulled via a cable a distance of 5.70m up a frictionless ramp to a height of 2.5m, where it stops. What is the potential energy of the crate after it is lifted? How much work is done during the lift? If it takes 10 seconds to lift the crate, what is the power rating of the lifting device?

The potential energy is 367.5 J and power is 36.75 W.

Explanation:

Given that,

Mass of a crate, m = 15 kg

It is lifted to a height of 2.5 m

We need to find the potential energy of the crate after it is lifted. It is given by the formula as follows :

If time, t = 10 s, Power is given by :

So, the potential energy is 367.5 J and power is 36.75 W.

connect the batteries in series and hope

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.