MOY Unit 2/3 Review

Multiple Choice

What does the slope of a position vs time graph tell you?

• Displacement

• Distance traveled

• Velocity

• Acceleration

Multiple Choice

What does the slope of a velocity vs. time graph tell you?

• Velocity

• Time

• Distance

• Acceleration

Multiple Choice

from 3rd second to 5th second, the object is

• moving at a constant speed

• speeding up

• not moving

• slowing down

Multiple Choice

According to the graph, what was the velocity for the first 5 seconds?

• 1 m/s

• 0.5 m/s

• 5 m/s

• 2 m/s

Multiple Choice

What kind of acceleration is shown here?

• positive
• negative
• none
• varies

Multiple Choice

Which section of the graph shows decreasing velocity?

• CD
• DE
• EF
• GH

Multiple Choice

Pushing a child on a swing is easier than pushing an adult on the same swing. What does this mean about the swingers?

• The child has less inertia than the adult.

• The child has more inertia than the adult.

• The child and the adult have equal amounts of inertia.

• The child and the adult have equal masses.

Multiple Choice

Why does a child have less inertia than an adult?

• The child moves with a greater velocity than the adult.

• The child moves with a smaller velocity than the adult.

• The child has less mass than the adult.

• The child has more mass than the adult.

Multiple Choice

A crash test dummy is used to test the durability of a new car seatbelt technology. During the first test, the seat belt failed and resulted to the dummy being ejected as seen on the pictures. Which of law of motion explains why the dummy ejected?

• Newton's 1st Law (Law of Inertia)

• Newton's 2nd Law (Law of Acceleration)

• Newton's 3rd Law (Law of Action-Reaction)

• Newton's 4th Law (Law of Science)

Multiple Choice

According to Newton's 1st Law, when forces on an object are balanced, the object will stay at rest if at rest or move with a constant velocity if already in motion. Which of the following graphs shows an object experiencing balanced forces?

Multiple Choice

A person steps out of the boat and onto the dock.  As the person moves forward onto the dock, the boat moves backward.  Which statement best describes the backward motion of the boat as the person steps forward?

• For every action there is an equal and opposite reaction.
• Every mass exerts a force on every other mass.
• An object at rest tends to stay at rest.
• Friction opposes the motion of an object.

Multiple Choice

The picture shows an aerialist walking on a tightrope and holding a balancing bar. An action-reaction pair of forces exists between which two things?

• The aerialist's feet and the rope

• The rope and the balancing bar

• The two ends of the rope

• The aerialist's arms and legs

Multiple Choice

Name the missing force....

• weight force
• normal force
• frictional force
• tension force

Multiple Choice

Whenever an object is moving, there is always this force opposing the motion:

• inertia

• momentum

• friction

• applied force

Multiple Choice

What is the NET FORCE of this diagram?

• 17 N, right

• 17 N, left

• 23 N, right

• 12 N, up

Multiple Choice

Which of the following is true about this free-body diagram?

• the forces are are balanced

• the object is free-falling

• the object is moving upward

• the forces are unbalanced

Multiple Choice

A rightward force is applied to a dresser to accelerate it to the right across the bedroom floor.

Multiple Choice

What net force is required to accelerate a car at a rate of 2 m/s² if the car has a mass of 3,000 kg?

• 6,000 N

• 1,500 N

• 3,002 N

• 2,998 N

Multiple Choice

What is the mass of a falling rock if it produces a force of 147 N? (Acceleration due to gravity = 9.8 m/s²)

• 15 kg

• 1,440.6 kg

• 156.8 kg

• 137.2 kg

Multiple Choice

The object is accelerating at a rate of 2 m/s². Determine the mass of the object.

• 2 kg

• 4 kg

• 6 kg

• 8 kg