Spring Semester Test Science 8

A group of students is playing tug-of-war. The students on both sides of the rope are pulling with an equal force so that the rope is not moving. This is an example of

• unbalances forces
• balanced forces
• acceleration
• displacement

The upward force on an object falling through the air is ____.

• air resistance
• momentum
• inertia
• gravity

The relationship among mass, force, and acceleration is explained by

• Law of Conservation of Momentum
• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

"To every action, there is an equal and opposite reaction" describes which law?

• Law of Conservation of Momentum
• Newton's 1st Law of Motion
• Newton's 2nd Law of Motion
• Newton's 3rd Law of Motion

When two forces on the same object are equal and opposite, these forces are called _______ forces.

• net
• balanced
• unbalanced
• frictional

As the mass of an object increases, its inertia will ________.

• decrease
• increase
• stay the same
• be unable to determine

An object that is falling freely has a constant what?

• speed
• velocity
• acceleration
• nothing is constant

In the picture below, if the card were quickly pulled off the cup like the arrow suggests, what property would explain why the coin falls into the cup rather than moving with the card?

• friction
• force
• inertia
• air resistance

An object will move at a constant velocity unless an unbalanced force acts upon it.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Law of Conservation of Momentum

Push or pull one body exerts on another.

• Force
• Gravity
• Momentum
• Weight