Forces Review/Practice Test-Conceptual Physics

Front

What is Newton's 1st Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Front

What is Newton's 2nd Law of Motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma).

Front

What is Newton's 3rd Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

What is the normal force?

Back

The normal force is the force exerted by a surface to support the weight of an object resting on it, acting perpendicular to the surface.

Front

How do you calculate net force?

Back

Net force is the vector sum of all the forces acting on an object.

Front

If two forces of 15 N are acting in the same direction, what is the net force?

Back

30 N to the right.

Front

What happens to gravitational force when the distance between two objects is tripled?

Back

The gravitational force decreases to 1/9 of its original value.

Front

What two factors affect the magnitude of the gravitational force between two objects?

Back

Mass and distance.

Front

What is the formula for gravitational force?

Back

F = G(m1*m2)/d^2, where G is the gravitational constant.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.