Universal Law of Gravitation Answers

Physics students study a piano being pulled across a room on a rug. They know that when it is at rest, it experiences a gravitational force of 2200 N. When it is being pulled with 1200 N it is sliding across the room in equilibrium, but the students feel like they had to pull harder than 1200 N at first to begin motion.

A box is at rest on a ramp at an incline of 22°. The normal force on the box is 538 N.

A box is being pulled to the right. The free body diagram is shown.

Which describes a positive or negative net force acting on an object? Check all that apply.It can cause an object to accelerate.It can cause an object to stop moving.It can cause an object to start moving.It can cause an object to change directions.It can cause an object at rest to remain at rest.

A box at rest is in a state of equilibrium half way up on a ramp. The ramp has an incline of 42° . What is the force of static friction acting on the box if box has a gravitational force of 112.1 N ?

20455075

JouleNewtonWatt

Two teams are playing tug of war. Team A pulls to the right with a force of 450 N. Team B pulls to the left with a force of 415 N.

A book is sitting on a desk. What best describes the normal force acting on the book?

A moving object is in equilibrium. Which best describes the motion of the object if no forces change?