Force and Motion Unit 2.18 Final Assessment

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

• Newtons

• Pounds

• Grams

• Meters

Talia and Amanda live across the street from each other, and they walk to school together every morning. The school is about 3 blocks away. Analyze the graph above and choose the correct description of their motion.

• Walking at a constant speed

• Stopping for a break

• Speeding up

• Slowing down

Why does Krisjen's car accelerate as it rounds a corner at a constant speed?

• Its direction changes

• It doesn't

• It slows down

• It speeds up

When two equal forces act in opposite directions on an object, they are called _______ forces.

Your laptop is sitting at rest on your desk. Which of the following statements best describes this situation?

• No forces are acting on your paper.

• Your paper pushes on the desk only.

• The desk pushes on your paper only

• The forces acting on the paper are balanced.

If Rayshawn 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 their 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.

Neveah needs to identify the magnitude and direction of this vector quantity.

a

b

Southeast, direction

How much, 55 m, magnitude

The force that opposes motion between two surfaces in contact with each other is called​ ​ (a)  

• friction
• inertia
• momentum
• gravity

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

• Speed is always greater than velocity.

• Speed is scalar; velocity is vector (includes direction).

• Velocity measures distance only, not direction.

• Speed can be negative while velocity cannot.

Martin was analyzing the behavior of objects on each other. He 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