Unit 2A-Review

The truck brakes used to control speed on a downhill. If a truck travels at a constant speed of 7 mph down the incline, which free body diagram below shows the forces acting on the car?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

The graph is showing a 7 kg object over time. What is the net force acting on an object? ( F = ma )

• 14N

• 15N

• 20N

• 12N

Tags

NGSS.HS-PS2-1

The diagrams represent Saturn and one of its moons, Titan. Which diagram shows the distance between the two points that should be used to calculate the gravitational attraction between Saturn and Titan?

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Megan weighs 580 N while standing at rest on a scale in her physics classroom. While performing a physics experiment on the relationship between normal force and weight, she stands on the same scale while riding on an elevator. During her ride, the scale reads her apparent weight. What does the scale read during a time interval when the elevator is slowing down as it is moving upward?

• The scale reads a value because the scale is not providing a normal force upward

• The scale reads a value greater than 580N because the scale is providing the normal force greater than her rest weight

• the scale reads a value less than 580N because the scale is providing the normal force less than her rest weight

• the scale reads a value of 580N because the scale is providing the normal force equal to her rest weight

Tags

NGSS.HS-PS2-1

A large box has a weight of 225 N. What is the mass of the box?

• 23 kg

• 53 kg

• 10 kg

• 35 kg

Tags

NGSS.MS-PS2-2

The mass of the object increases from 5 kg to 6 kg and the net force on the object remains the same. Which of the following describes what will happen to the acceleration of the object when its mass is increased?

• the acceleration of the object will increase

• the acceleration of the object will decrease

• there is no change in acceleration

• not enough information to make a conclusion

Tags

NGSS.MS-PS2-2

In the 1970s, two twin spacecraft, Voyager 1 and Voyager 2, were launched to study and explore the outer planets. Both of these spacecraft completed their missions in the 1980s, and continue to cruise their way out of the solar system. Which law of physics explains how these spacecraft continue their constant speed journey?

• Newton's First Law of Motion

• Newton's Second law of Motion

• Newton's 3rd Law of Motion

• Newton's Law of Gravtiational force

The two figures show two bodies of equal mass.  Compared to the bodies in Figure 1, the gravitation attraction between the bodies in Figure 2 is:

• One-Fourth as strong

• One-Half as strong

• Twice as strong

• Four times as strong

Tags

NGSS.MS-PS2-4

A ball is left in the cabin of an airplane. When the plane accelerates forward, the passengers remain in their seats, and the ball rolls to the back of the cabin.

According to the information and diagram shown above, what happens to the ball when the plane stops?

• the ball accelerated towards the back of the plane with a higher magnitude

• the ball rolls to the front of the cabin

• the ball's inertia keeps it from moving forward

• the ball continues moving backward just as it was when the plne was accelerating forward

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A 10 kg block has an applied force of 75N acted upon it. If the block has an acceleration of 6 m/s2. Determine the magnitude of the force due to friction

• 30 N

• 15 N

• 40 N

• 10 N

Tags

NGSS.MS-PS2-2