Work and Power Answers

A box that has a mass of 80 kg slides down a ramp with a 30 degree angle. The free-body diagram shows the forces acting on the box.

A rocket experiences a constant force even as the amount of fuel in its fuel tanks decreases. What happens to the acceleration of the rocket as it runs out of fuel?

Which formula is used to calculate the mass of an object if the force and acceleration are known?

Devon has several toy car bodies and motors. The motors have the same mass, but they provide different amounts of force, as shown in this table.The bodies have the masses shown in this table.

Tracy stands on a skateboard and tosses her backpack to her friend who is standing in front of her. Which best describes the acceleration Tracy experiences?

What is the mass of a crate if a net force of 12 N gives the crate an acceleration of 0.20 m/s2?

How much force is needed to accelerate an object of mass 90 kg at a rate of 1.2 m/s2?

Juanita studies several free-body diagrams in which a normal force is shown. What is always true about a normal force in a free-body diagram?

What is the mass of an object if a net force of 8.0 N causes it to accelerate at 1.1 m/s2?