Physical Science Unit 2 Motion

Type the correct answer in the box. A car accelerates from 4 meters/second to 16 meters/second in 4 seconds. The car’s acceleration is ___ meters/second².

• 3

• 2

• 4

• 5

Select the correct answer. A car moves with an average speed of 45 miles/hour. How long does the car take to travel 90 miles?

• 2 minutes

• 2 hours

• 45 minutes

• 45 hours

• 90 minutes

Select the correct answer from each drop-down menu. The graph describes the motion of an object. The object moves with [ ] from A to B. It [ ] from B to C. It moves with [ ] from C to D.

• positive acceleration

• constant velocity

• speeds up

• negative acceleration

• zero acceleration

Select the correct answer. Which segment of this graph shows a decreasing velocity?

• A to B

• B to C

• C to D

• D to E

• E to F

Select the correct sentences on the image. Matthew throws a ball straight up into the air. It rises for a period of time and then begins to drop. At which points in the ball’s journey will gravity be the greatest force acting on the ball?

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Select the correct answer. What is the primary force that helps suspension bridges use cables to hold their spans up?

• tension force

• resistance force

• normal force

• elastic force

• applied force

Select the correct answer. Gina is driving her car to work, but she's stopped at a red light. When the light turns green, she presses the gas pedal and accelerates (speeds up) to move the car. Which of these statements is true the moment Gina presses the gas pedal? Assume the road is flat and level.

• The net force on the car is zero in the horizontal direction.

• The net force on the car is zero in the horizontal and the vertical directions.

• The net force on the car is greater than zero in the horizontal direction.

• The net force on the car is greater than zero in the vertical direction.

• The net force on the car is less than zero in the vertical direction.

Select the correct answer. James gently releases a ball at the top of a slope, but does not push the ball. The ball rolls down the slope. Which force caused the ball to move downhill?

• applied force

• drag force

• friction force

• gravitational force

• normal force

Select the correct answer. An object has one force acting on it. It is a 33-newton force pointing downward. To create a net force of zero on the object, which force must be applied to it?

• a 33-newton force pointing upward

• a 1-newton force pointing upward

• a 33-newton force pointing left

• a 0-newton force pointing downward

• a 1-newton force pointing right

Anne applies a force on a toy car and makes it move forward. What can be said about the forces acting on the toy car at the moment Anne applies the force? The forces acting on the toy car are:

• restricted

• balanced

• equal

• unbalanced