Give an example of a contact force and a non-contact force. Explain how they are different.

Lee has been moving a crate that has a mass of 125 kg and required 120 J of work to move. The crate was moved a distance of 20 meters in 30 seconds. What was the power output?

An AC generator spins a magnet inside a loop of wire to generate an induced current. Which of the following changes would cause the amount of induced current to increase? Group of answer choices a) None of these would increase the induced current.

A car is travelling along a straight road at 25 m/s. To avoid an accident, the car has to brake to a sudden stop in 2.5 s. What is the acceleration of the car?

Which two objects attract each other? A. a proton and an electron B. two electrons C. a proton and a neutron D. two protons

Two cylinders (one hollow, one solid) made of linear elastic materials with the same outer diameter and length are subjected to the same external torque. Neither cylinder breaks at this torque.

Which sentence contains italicized words that are used as an infinitive phrase? A. Kelly went to the grocery store. B. Tom went there for some flour. C. Mark wanted to go, but not today. D. Jane parked her car behind a truck.

The difference in electric potential between a thunder cloud and the ground is 1.53 108 V. Electrons move from the ground which is at a lower potential to the cloud which is at a higher potential.

A vitamin called folic acid is very important for neural tube development, which is the development of the baby's

Which vocabulary term is survival of the fittest

An object weighs 32 newtons. What is its mass if a gravitometer indicates that g = 8.25 m/s2?