Dynamics: Forces and Newton's Laws

Newton's three laws, free-body diagrams, friction and inclines.

9 questions, free, marked as you go with a worked explanation on every one.

What this covers

A net force of 3600 N acts on a 1200 kg car. What is its acceleration?
What is the weight of a 65 kg student on Earth? Take g = 9.81 m/s².
The floor pushes up on a sliding crate with a normal force of 500 N. The coefficient of kinetic friction between the crate and the floor is 0.30. What friction force acts on the crate?
A 10 kg box sits on a frictionless ramp inclined at 30°. What is the component of gravity acting down the slope? Take g = 9.81 m/s².
A 5.0 kg cart is pushed right with 40 N while friction pushes left with 15 N. What is its acceleration?
A book rests on a table. Which pair of forces is a Newton's third law action-reaction pair?
A passenger lurches forward when a bus brakes suddenly. Which law explains this?
Which of these are true of an object moving at constant velocity? Select all that apply.
Use the table. Using the pattern it shows, what is the object's mass, in kilograms?