Fill in Each Blank with the Term That Best Completes the Following Sentences

Unit 1: Motion and Forces

Vocabulary

Fill in each blank with the term that best completes the following sentences.

1.The______of an object describes the speed and the direction in which it is going.

2.The change in the velocity of an object is defined as its ______.

4.The ______on an object is the combination of all the forces acting on the object.

Key Concepts

Read each question below, and circle the best answer.

6.An airplane leaves New York to fly to Los Angeles. It travels 3,850 km in 5.5 hours. What is the average speed of the airplane?

A.700 kmC.700 km/hour

B.700 hoursD.700 hours/km

11.Julia is in a car with her father. The car is undergoing centripetal acceleration. What is happening to the car?

A.The car is changing direction at a constant speed.

B.The car is changing direction and speeding up.

C.The car is stopping suddenly.

D.The car is slowing down.

1.Which scenario does not describe an example of acceleration?

A.A car increases its speed while turning to
the left.

B.A car decreases its speed while driving straight ahead.

C.A car maintains a constant speed while turning to the right.

D.A car maintains a constant speed while driving straight ahead.

2.Measuring acceleration requires appropriate units. Which are the SI units for acceleration?

A.N

B.m/s

C.m/s2

D.kg·m/s

Lesson Quiz1Module I • Assessment Guide

Name ______Date ______

3.Which of the following is an example of acceleration?

A.A boat sits on a boat trailer.

B.A car moves in a straight line at 60 km/hr.

C.A plane moves in air at a steady speed of
850 km/hr.

D.A bus moves on a straight road and then makes a right turn.

4.A car travels in a straight line. The driver applies the brakes and comes to an abrupt stop. During braking, what happens to the velocity and acceleration vectors?

A.They point in opposite directions.

B.They point in the same direction.

C.They are at right angles to each other.

D.They create centripetal acceleration.

5.Rheka conducted an experiment with a radio-controlled toy car. The sketches show her findings.

What is the average acceleration of the car?

A. 5 m/s2

B.10 m/s2

C.15 m/s2

D.20 m/s2

1.A box of books is on the floor. The following picture shows a push and a pull acting on
the box.

What is the net force toward the right on
the box?

A.0 N

B.50 N

C.100 N

D.2,500 N

2.Which of the following is considered a contact force?

A.the force between two magnets

B.the gravitational pull of a planet

C.friction between an object and air

D.the force between two charged particles

3.Two equal forces act in opposite directions on object A. Two unequal forces act in opposite directions on object B. If these are the only forces acting on objects A and B, which of the following conclusions is true?

A.Only object A will accelerate.

B.Only object B will accelerate.

C.Both object A and object B will accelerate.

D.Neither object A nor object B will accelerate.

4.Jessica has two balls. One ball has a mass of
1 kg. The other ball has a mass of 2 kg.
She pushes each with a force of 100 N. How does the acceleration of the two balls compare?

A.The 1-kg ball accelerates the same as the
2-kg ball.

B.The 1-kg ball accelerates half as much as the 2-kg ball.

C.The 1-kg ball accelerates twice as much as the 2-kg ball.

D.The 1-kg ball accelerates four times as much as the 2-kg ball.

5.During a baseball game, a hitter strikes the ball with a bat. When this happens, the ball and
the bat exert a force on each other. Why does the ball accelerate away from the bat more than
the bat accelerates away from the ball?

A.The ball has less mass, so it exerts less force on the bat.

B.The ball has greater velocity before the collision, so the force affects the ball more than it affects the bat.

C.The bat exerts more force than the ball because the batter is exerting a force on the bat as it hits the ball.

D. The ball has less mass, so the equal force on the ball and the bat causes greater acceleration

Critical Thin king

Answer the following questions in the space provided.

13.Marek is trying to push a box of sports equipment across the floor. The arrow on the box is a vector representing the force that Marek exerts.

What are the forces acting upon the box?

______

14.What does the formula F = ma mean, and which of Newton’s three laws does it describe?

______

Essential Questions

Lessons 1 and 2

Answer the following question in the space provided.

15.What is the difference between the speed of an object, the velocity of an object, and the acceleration of an object?

______

You will need to be able to read a graph and explain what is happening.

You need to be able to calculate speed, velocity, acceleration, and force.

You need to be able to read a data table and calculate the information.

Unit Review1Module I • Assessment Guide