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Cumulative Exam — Cumulative exam Answers

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What is the acceleration along the ground of a 10 kg wagon when it is pulled with a force of 44 N at an angle of 35° above the horizontal?

A
0.23 m/s2
B
0.28 m/s2
C
2.52 m/s2
D
3.60 m/s2
22
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A crane lifts up two boxes.

Question illustration
A
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.
Option A
B
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.
Option B
C
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.
Option C
D
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.
Option D
23

Jan made a diagram to compare speed and velocity.

Question illustration
A
Is always constant
B
Includes magnitude
C
Has direction
D
Depends on a reference frame
24

Cranberries and grapes may have therapeutic value. A cranberry company obtained the patent for a process to extract the oil from cranberry seeds. According to the patent, this oil can be used to treat breast cancer or to reduce its incidence. The oil can be used in drinks and foods. A grape juice company claims to have evidence that certain grapes have health benefits ranging from improving cardiovascular health to improving cognitive brain function in the elderly. These claims will be tested by the Food and Drug Administration (FDA) before the companies are allowed to market their products for “treating” ailments or “improving” health. Until then, the companies can describe that their products “help to maintain” or “support” health. Until studies support their claims, the companies cannot ascribe direct health benefits to their products.Why would the FDA perform tests when a cranberry company and a grape company have already conducted research on the same products?

A
The FDA is the only organization that can test if health actually improves.
B
Tests that are performed by any company which benefits financially are considered unreliable.
C
The FDA tests give reliability to the results of improved health obtained by each company.
D
Tests performed by the FDA follow established scientific methods, but those performed by companies do not.
25

The research and design team of a car manufacturing company is developing a new safety product that automatically tests a car’s brakes. When the team discusses how exactly they plan to determine whether the new technology is successful or not, what stage of technological design are they in?

A
first
B
second
C
third
D
fourth
26

What is the kinetic energy of an object that has a mass of 50.0 kg and a velocity of 18 m/s?

A
450 J
B
900 J
C
8,100 J
D
16,000 J
27

Question text not available

Question illustration
A
the x-axis
B
a direct relationship
C
the independent variable
D
the dependent variable
28

A block slides down a rough ramp with a 30-degree incline as shown.Which diagram represents the forces acting on the block?

Question illustration
A
Option
B
Option
C
Option
D
Option
29

A velocity vs. time graph for an object is shown.

Question illustration
A
constant and positive
B
constant and negative
C
changing and positive
D
changing and negative
30

The first known telescopes, used around 1600, consisted of a lens and an eyepiece. Today, telescopes are often computer controlled and consist of a complicated array of sophisticated lenses. Which statement correctly describes how telescopes have changed over time?

A
The telescopes of the 1600s were used until the year 2000, when a more sophisticated telescope was built.
B
The telescopes of the 1600s were gradually improved upon over time, resulting in the telescopes that are available today.
C
The telescopes of the 1600s were used until the year 1900, when a more sophisticated telescope was built that was used until the year 2000.
D
The telescopes of the 1600s were abandoned after about 50 years, and the technology was completely replaced.
31

An entire group of elements was unknown when the periodic table was first developed because they were unreactive and no known compounds were composed of them. What most likely led to the inclusion of these elements in the periodic table?

A
the formation of a compound in the laboratory
B
new technology that showed how to identify one of the elements
C
improvements in instruments to measure small masses
D
more careful experiments to create synthetic elements
32

Briana swings a ball on the end of a rope in a circle. The rope is 1.5 m long. The ball completes a full circle every 2.2 s.

A
0.68 m/s
B
2.1 m/s
C
4.3 m/s
D
9.2 m/s
33

Ronnie kicks a playground ball with an initial velocity of 16 m/s at an angle of 40° relative to the ground. What is the approximate horizontal component of the initial velocity?

A
0.64 m/s
B
0.77 m/s
C
10.3 m/s
D
12.3 m/s
34

In which scenario is the greatest amount of work done on a wagon?

A
A force of 55 N moves it 8 m.
B
A force of 60 N moves it 6 m.
C
A force of 50 N moves it 5 m.
D
A force of 40 N moves it 10 m.
35

Question is locked

Answer not available
36

A 2.5 kg block is launched along the ground by a spring with a spring constant of 56 N/m. The spring is initially compressed 0.75 m.

A
3.5 m/s
B
4.1 m/s
C
13 m/s
D
16 m/s
37

A car moving south speeds up from 10 m/s to 40 m/s in 15 seconds. What is the car’s acceleration?

A
2 m/s2
B
15 m/s2
C
30 m/s2
D
50 m/s2
38

Which discovery is most directly related to careers in biology?

A
the formation of a new space program to launch flights to Mars
B
the discovery of the genes that are responsible for Alzheimer’s disease
C
the unearthing of an ancient civilized community in the Pacific Northwest
D
the production of a new synthetic material that is used in electronics manufacturing
39

Rebekah finds that a solution of sugar in water has a volume of 1.32 fl. oz. How should she report this amount using the metric system? (1 fl. oz. = 29.6 mL)

A
0.403 m
B
1.40 qt
C
37.5 g
D
39.1 mL
40

The acceleration due to gravity on Earth is 9.8 m/s2. What is the weight of a 75 kg person on Earth?

A
9.8 N
B
75 N
C
85 N
D
735 N

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