Physics Test Review

Two vehicles (white van, black car) are traveling at the same speed and in the same direction on a highway. If the front of the white van is 20 meters behind the front end of the black car, what is the point of reference?

• the middle of the black car

• the front of the black car

• the back of the black car

Jimmy is doing an experiment. He drops a bowling ball and a stuffed bear out of the window of a tall building. Under what conditions would they have the same acceleration?

• if they had the same mass

• if they had the same weight

• if there was no air resistance

• if there was no gravity

Which has the most gravitational potential energy?

• 1 kg book

• 10 kg rock

• 100 kg person

When forces are acting in OPPOSITE directions, how do you find the net force?

• add the forces

• subtract the forces

• multiply the forces

• divide the forces

What can a number line be used to describe?

• the color of an object

• the number of times an object has moved

• an object's speed

• an object's distance from a reference point

What are electric forces?

• attractive contact forces between charged particles

• repulsive non-contact forces between uncharged particles

• attractive or repulsive CONTACT forces between charged particles

• attractive or repulsive NON-CONTACT forces between charged particles

Which object has greater acceleration when acted on by gravitational forces? A 2 kg apple, a 10 kg bowling ball or a 20 kg rock?

• the 2 kg apple

• the 10 kg bowling ball

• the 20 kg rock

• they all have the same acceleration when acted on by gravitational force

Which is the acceleration caused by Earth's gravity?

• 5 m/s^2

• 9.8 m/s^2

• 15.2 m/s^2

• 20 m/s^2

Speed is the rate that describes....

• the distance an object moves over time

• an object's changes in direction over time

• the difference in distance between two objects

• the distance and direction in which an object moves

When force is exerted on one object by another and they both move in the SAME direction, energy is...

• added to the second object

• subtracted from the second object

• divided in half because there are two objects

• doubled because there are two objects