An object weighing 75 Newton's is dropped from the top of a building and falls a distance of 28 Meters to the ground. How much work does gravity do on the object from the time it is dropped to the time it hits the ground?

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential? a.the kinetic energy increases.b.the kinetic energy decreases.c.the kinetic energy remains the same.d.the kinetic energy is always zero.

Which of these metals are magnetic?