Chapter 1&2 Test

According to Newton's first law of motion, a moving object that is not acted on by an unbalanced force will

• remain in motion.

• change its momentum.

• eventually come to a stop.

• accelerate.

An ice skater at rest pushes against a sled at rest, causing both the skater and sled to move away from each other with different accelerations. This is an example best described by

• Newton's first law of motion for objects at rest.

• Newton's first law of motion for objects in motion.

• Newton's second law of motion.

• Newton's third law of motion.

Which of the following explains the difference between speed and velocity?

• One has motion, and the other does not.

• One has direction, and the other does not.

• One involves time, and the other does not.

• One involves acceleration, and the other does not.

Dividing the total distance traveled by the total time is how to calculate

• average acceleration.

• average motion.

• average speed

• velocity

T/F: Without any force to change it, an object at rest stays at rest and an object in motion stays in motion.

• True

• False

An object with a mass of 1.5 kg accelerates 10.0 m/s² when an unknown force is applied to it. What is the amount of force?

• 150 N

• 1000 N

• 15 N

• 15000 N

An object accelerates 5.0 m/s² when a force of 20.0 newtons is applied to it. What is the mass of the object in kg?

• 10.0 kg

• 6.0 N

• 4.0 N

• 4.0 kg

An object with a mass of 3.0 kg has a force of 9.0 newtons applied to it. What is the resulting acceleration of the object?

• 3.0 m/s²

• 6.0 m/s²

• 27.0 m/s²

• 0.9 m/s²

A roller coaster's velocity at the top of a hill is 10 m/s. Two seconds later it reaches the bottom of the hill with a velocity of 26 m/s. What was the acceleration of the coaster?

• -8 m/s

• 18 m/s²

• 4 m/s

• 8 m/s²

A 30 kg television sits on a table. The acceleration due to gravity is 10 m/s². What force does the table exert on the television?

• 30 N
• 100 N
• 500 N
• 300 N