4. The mechanical advantage of a pulley system is 10. It takes 130 N of force to lift a crate without the pulley system. a. What is the mass of the crate?
b. How much force needs to applied to the pulley system in order to lift the crate?
c. How much power is exerted by the machine if the crate lifts 750 cm in 2 seconds? Express the units two different ways.

Please help me

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2