S1: Describing Motion and Energy

If the net force acting on a stationary object is zero, then the object will

• accelerate in the direction of the strongest force.

• remain at rest.

• begin moving backwards.

• decelerate at a steady rate of speed.

An object that changes position relative to a reference point is said to be . . .

• stationary

• in motion..

• moving at constant speed.

• moving at constant velocity.

The _____ of an object consists of its speed and direction.

• velocity

• instantaneous speed

• average speed

• displacement

On a distance vs. time graph of an object’s motion, the X-axis is usually . . .

• the distance

• the dependent variable.

• the time

• measured in ft/min.

When the motion of an object is shown by a line on a distance vs. time graph with distance on the y-axis, the slope of the line is the

• distance traveled.

• speed.

• displacement.

• time of travel.

The force that opposes motion is called . . .

• Resistance

• Terminal Velocity

• Friction

• Weight

What is defined as the change in velocity divided by time?

• speed.

• final velocity.

• acceleration.

• distance.

In order to determine speed, you must know

• only time.

• both time and distance.

• only distance.

• neither time nor distance.

The law that states that every object maintains constant velocity unless acted on by an unbalanced force is

• Newton’s first law of motion.

• Newton’s second law of motion.

• Newton’s third law of motion.

• the law of conservation of momentum.

What is the unbalanced force that slows down a ball rolling across the floor?

• the force of gravity

• the force of friction

• the force of inertia

• the force of momentum