Semester Review Day 3

A sled, sliding on a flat, icy surface with a constant velocity is best described by

• Newton's 3rd law of motion

• Newton's 1st Law of Motion for objects at rest

• Newton's second law of motion

• Newton's 1st law of motion for objects in motion

A crumpled piece of paper hits the ground before a flat sheet of paper because

• the crumpled paper is less massive.

• the crumpled paper is more massive.

• there is more air resistance against the flat paper.

• the acceleration of gravity is greater on the crumpled piece of paper.

The force that opposes motion between two surfaces in contact with each other.

• momentum

• gravity

• inertia

• friction

You push against a wall and the wall is pushing back on you.

• Newton's 1st Law of Motion

• Newton's 3rd Law of Motion

• Newton's 2nd Law of Motion

The tendency of an object to resist changes in motion is ....

• inertia

• velocity

• acceleration

• force

What is the acceleration of a 50kg object pushed with a force of 500 newtons?

• 25 m/s²

• 10 m/s²

• 25,000 m/s²

• 100 m/s²

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

• Newton's 1st Law of Motion

• Newton's 2nd Law of Motion

• Newton's 3rd Law of Motion

• Newton's 4th Law of Motion

The gravitational force of any object near Earth's surface is ___

• Newton's 1st Law

• Unknown

• Friction

• 9.8 m/s²

When an unbalanced force acts on an object, the force ______________________.

• is canceled by another force

• does not change the motion of the object

• changes the motion of the object

• is equal to the weight of the object

Any push or pull on an object.

• velocity

• momentum

• inertia

• force