According to the law of electromagnetic induction (Faraday’s law), what changes can cause an emf to be induced in a loop of wire?

A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.

What equation is used to calculate the weight of an object on a plant ?