AnswersPhysicsN/A

N/A — Exam Answers

50 verified answers
1
Free Preview

Which label belongs in the region marked X?

A
Has a velocity of zero
B
Is slowing down and coming to rest
C
Has a net force of zero
D
Is moving with a constant velocity
2
Free Preview

How much electrical energy is involved in this transformation?

A
80 J
B
60 J
C
120 J
D
100 J
3

Which statement relates most directly to the second law?

A
1
B
2
C
3
D
4
4

Which label belongs in the area marked X?

A
Depends on a reference frame
B
Includes magnitude
C
Has direction
D
Is always constant
5

Which arrow represents the centripetal force responsible for this motion?

A
W
B
X
C
Y
D
Z
6

If the goal of the turbine is to put out electric energy, what is the efficiency of the turbine?

A
75 percent
B
100 percent
C
25 percent
D
50 percent
7

Which free body diagram shows the forces acting on block A?

A
Image with description A free body diagram with three force vectors, the first pointing downward labeled F Subscript g A Baseline, the second pointing upward labeled F Subscript T 1 Baseline, and the third pointing upward labeled F Subscript T 2.
B
Image with description A free body diagram with three force vectors, the first pointing downward labeled F Subscript g A Baseline, the second pointing upward labeled F Subscript T 1 Baseline, and the third pointing downward labeled F Subscript g B.
C
Image with description A free body diagram with two force vectors, the first pointing downward labeled F Subscript g A Baseline, the second pointing upward labeled F Subscript T 1 Baseline.
D
Image with description A free body diagram with three force vectors, the first pointing downward labeled F Subscript g A Baseline, the second pointing upward labeled F Subscript T 1 Baseline, and the third pointing downward labeled F Subscript T 2.
8

Which lists the springs based on the amount of elastic potential energy, from greatest to least?

A
Z, W, Y, X
B
Z, Y, W, X
C
X, W, Y, Z
D
X, Y, W, Z
9

Which labels best complete the diagram?

A
X: Work is done to the system and temperature decreases. Y: Work is done by the system and temperature increases.
B
X: Work is done by the system and temperature decreases. Y: Work is done to the system and temperature increases.
C
X: Work is done by the system and temperature increases. Y: Work is done to the system and temperature decreases.
D
X: Work is done to the system and temperature increases. Y: Work is done by the system and temperature decreases.
10

Which describes what happens to the bone?

A
It stays in dynamic equilibrium.
B
It stays in static equilibrium.
C
It begins to move toward the left.
D
It begins to move toward the right.
11

Which trial shows the conservation of momentum in a closed system?

A
Trial 1
B
Trial 2
C
Trial 3
D
Trial 4
12

Which best describes the acceleration of the object?

A
changing and positive
B
constant and positive
C
changing and negative
D
constant and negative
13

Which diagram represents the forces acting on the block?

A
Image with description A free body diagram with three forces: a force vector north labeled F Subscript N Baseline, a force vector southeast labeled F Subscript f Baseline, and a force vector south labeled F Subscript g Baseline, which is equal in magnitude but opposite in direction the north vector.
B
Image with description A free body diagram with three forces: a force vector northeast labeled F Subscript N Baseline, a force vector southeast labeled F Subscript f Baseline, and a force vector south labeled F Subscript g Baseline.
C
Image with description A free body diagram with three forces: a force vector northeast labeled F Subscript N Baseline, a force vector southeast labeled F Subscript f Baseline, and a force vector southwest labeled F Subscript g Baseline that is equal in magnitude but opposite in direction to the vector pointing northeast.
D
Image with description A free body diagram with three forces: a force vector northeast labeled F Subscript N Baseline, a force vector northwest labeled F Subscript f Baseline, and a force vector south labeled F Subscript g Baseline.
14

What is the acceleration along the ground of a 10 kilograms wagon when it is pulled with a force of 44 cap n at an angle of 35 degrees above the horizontal?

A
3 point 6 0 the fraction with numerator m and denominator s squared
B
2 point 5 2 the fraction with numerator m and denominator s squared
C
0 point 2 3 the fraction with numerator m and denominator s squared
D
0 point 2 8 the fraction with numerator m and denominator s squared
15

Which best describes the heat that you can feel on the engine of a running car?

A
The heat is unusable and absorbed by the engine.
B
The heat is usable and absorbed by the engine.
C
The heat is unusable and lost to the surroundings.
D
The heat is usable and lost to the surroundings.
16

A train travels 600 kilometers in 4 hours. What is the speed of the train?

A
0.007 kilometers per hour
B
604 kilometers per hour
C
2 comma 400 kilometers per hour
D
150 kilometers per hour
17

A car manufacturer wants to change its car’s design to increase the car’s acceleration. Which changes should the engineers consider making to the design? Choose two correct answers.

A
increase the force that the engine provides
B
decrease the mass of the car
C
increase the top velocity the car can travel
D
increase the mass of the car
E
decrease the force that the engine provides
F
decrease the top velocity the car can travel
18

A system uses 2,380 J of energy to do work as 12,900 J of heat are added to the system.

Answer:

15380

19

Rosalinda wants to calculate the mass of Earth using Kepler’s laws or Newton’s universal law of gravitation.Which data would allow her to find the mass of Earth?

A
Earth’s distance from the Sun and the moon’s orbital period
B
the moon’s orbital period and distance from Earth
C
the mass of the Sun and the orbital period of the moon
D
Earth’s orbital period and distance from the Sun
20

Which graph shows the relationship between temperature, X, and kinetic energy, Y?

A
Image with description A graph with the x axis labeled X and the y axis labeled Y. There is a horizontal line.
B
Image with description An illustration of a triangle with the base labeled X with the height labeled Y.
C
Image with description A graph with the x axis labeled X and the y axis labeled Y. There is a diagonal line from the origin.
D
Image with description A graph with the x axis labeled X and the y axis labeled Y. There is a vertical line.

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