Unit 2.19 Force and Motion

Avari is measuring the force needed to push a shopping cart. What is the standard unit force is measured in?

• Newtons

• Pounds

• Grams

• Meters

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When Tavia and Zae push a box with equal force in opposite directions, the forces are called __________.

• Frictional force

• Balanced force

• Centripetal force

• Gravitational force

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Delaney's book is sitting at rest on her desk. Which of the following statements best describes this situation?

• No forces are acting on Ethan's book.

• Ethan's book pushes on the desk only.

• The desk pushes on Ethan's book only.

• The forces acting on Ethan's book are balanced.

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NGSS.MS-PS2-2

Dwayne's car is moving on a road at 70 km/hr going due north, and then changes direction and starts traveling north-east staying at 70 km/hr, what happens to its speed and velocity?

• The speed of the car changes, but the velocity stays the same.

• Both the speed and velocity of the car change.

• Neither the speed nor the velocity of the car changes.

• The velocity of the car changes, but the speed stays the same.

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NGSS.MS-PS2-1

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Geanna is learning about physics. She wants to know how a vector quantity can be defined as _________.

• Having magnitude only.

• Having both magnitude and direction.

• Having direction only.

• Velocity minus direction.

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When Allie pushes the pizza box across the table, the force that opposes the motion between the pizza box and the table is called __________.

• Inertia

• Friction

• Momentum

• Gravity

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NGSS.MS-PS2-1

Kayden is driving a car on a straight road. What is the difference between the speed of the car and its velocity?

• Speed has both a size and a direction.

• Velocity has both a size and a direction.

• Velocity and speed are the same things.

• Velocity has a distance while speed has a position.

Kenia was analyzing the behavior of objects on each other. She recalls that every object exerts a gravitational force on every other object but could not identify the object’s property that plays a role in the gravitational force that is exerted on other objects. What is that property?

• Mass

• Volume

• Temperature

• Speed

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Xander slams on the brakes after traveling 40 m/s. It takes him 2 seconds to come to a complete stop. What is his acceleration?

• 20 m/s²

• -20 m/s²

• 80 m/s²

• 38 m/s²

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NGSS.MS-PS2-1

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Marge is walking her cat and the velocity-time graph shows her journey. What is the cat doing in segment A?

• Positive acceleration

• Negative acceleration

• Constant Velocity

• Not moving

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