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.

this is a good question! i'll do some research and come back when i have the answer!

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft