Chapter 2 Retest

Two cars with different masses travel at the same speed down a hill toward a stop sign. What will happen when both cars apply brakes at the same time to stop?

• The car with the larger mass will maintain its velocity while traveling down the hill.

• The car with the smaller mass will require less force to stop than the car with the larger mass.

• The car with the larger mass will have less inertia than the car with the smaller mass.

• The car with the smaller mass will take longer to stop than the car with the larger mass.

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A student uses a magnet to move a 0.25 kg metal ball. The magnet exerts a force of 10 N, which causes the ball to begin moving. What is the acceleration of the ball when it begins to move?

• 2.5 m/s²

• 4 m/s²

• 10 m/s²

• 40 m/s²

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NGSS.MS-PS2-2

When a space shuttle was launched, the astronauts onboard experienced an acceleration of 20.0 m/s². If one of the astronauts had a mass of 50.0 kg, what net force in newtons did the astronaut experience?

• 1000 Newtons

• 500 Newtons

• 1500 Newtons

• 2000 Newtons

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When a space shuttle was launched, the astronauts onboard experienced an acceleration of 29.0 m/s². If one of the astronauts had a mass of 60.0 kg, what net force in newtons did the astronaut experience?

• 1740 N

• 1500 N

• 1800 N

• 2000 N

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If the force of the racket hitting the ball is 150 N, what must be the force of the ball hitting the racket?

• slightly greater than 150 N

• slightly less than 150 N

• exactly 150 N

• much greater than 150 N

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Based on the data displayed in the table above, which of the following conclusions can be made concerning the objects involved in the investigation? Select TWO correct answers.

• Object 3 had the greatest mass.

• All of the objects were made of different material.

• Object 4 had the greatest mass.

• Object 4 had the least mass.

• Objects 1, 3, and 5 were made of different material than Objects 2 and 4.

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A student straps an action figure into a toy car and pushes it down a ramp. At the end of the ramp, the toy car hits a wall and comes to a stop. The restraints keep the action figure from falling out of the toy car. Which statements regarding Newton’s Laws of Motion are true based on this scenario? Select THREE choices.

• The action figure moves with the same motion as the toy car until the restraint stops it.

• The action figure moves with the same motion as the toy car until the wall stops it.

• The greater the acceleration of the action figure, the greater the force.

• The force of the action figure on the restraint is equal to the force of the restraint on the action figure.

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Variables involved in how the plates move can be determined using the equation F = ma from Newton's ___ Law.

• First

• Second

• Third

• Fourth

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When two plates slide sideways past each other at a transform boundary, this action can cause an earthquake of equal force, describing Newton's ___ Law.

• First

• Second

• Third

• Fourth

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You are riding in a vehicle with a coffee cup on the dashboard while traveling 30 km/h. The vehicle makes a sudden stop to avoid hitting the car that has stopped in front of it. What would happen to the coffee cup?

• Go forward

• Go backward

• Stay stationary

• Straight up

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