1757079
Questão 1
Questão
Assuming that the box is moving to the right, what is the magnitude and direction of the force applied by the person pushing?
Responda
-
2 N, right
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2 N, left
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0.4 N, right
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0.4 N, left
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10 N, left
Questão 2
Questão
A car slides up a frictionless inclined plane. How does the normal force of the incline on the car compare with the weight of the car?
Responda
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The normal force must be equal to the car's weight.
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The normal force must be less than the car's weight.
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The normal force must be greater than the car's weight.
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The normal force must be zero.
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The normal force could have any value relative to the car's weight.
Questão 3
Questão
What is the magnitude of the acceleration of the 40 kg block?
Responda
-
0.5 m/s•s
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1 m/s•s
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2 m/s•s
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4 m/s•s
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5 m/s•s
Questão 4
Questão
What is the magnitude of the tension T in the rope that connects the two blocks?
Responda
-
0 N
-
10 N
-
20 N
-
40 N
-
50 N
Questão 5
Questão
Two people are pulling on the ends of a rope. Each person pulls with a force of 100 N. The tension in the rope is:
Responda
-
0 N
-
50 N
-
100 N
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141 N
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200 N
Questão 6
Questão
What must be necessary for the driver to feel weightless?
Responda
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at the top of a hill when v > √gr
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at the bottom of a hill when v > √gr
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going down a hill when v = √gr
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at the top of a hill when v < √gr
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at the bottom of a hill when v < √gr
Questão 7
Questão
In which position would the tension in the string be largest?
Responda
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The tension in mass A
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The tension in mass B
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The tension in mass C
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The tension in mass D
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All strings have the same tension
Questão 8
Questão
What is the magnitude of the acceleration of the "two block" system?
Responda
-
1 m/s•s
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2 m/s•s
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3 m/s•s
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6 m/s•s
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15 m/s•s
Questão 9
Questão
What is the magnitude of the force of static friction between the top and bottom blocks?
Responda
-
0 N
-
10 N
-
20 N
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25 N
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30 N
Questão 10
Questão
What is the minimum coefficient of static friction necessary to keep the top block from slipping on the bottom block?
Responda
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0.05
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0.10
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0.20
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0.30
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0.40
Questão 11
Questão
A satellite orbiting the Earth with a radius of R has an acceleration due to gravity of Ag. If the radius is doubled, what is the acceleration of the satellite?
Responda
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Ag
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Ag/4
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Ag/2
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Ag/3
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Ag/16
Questão 12
Questão
What is the tension in the horizontal cable?
Responda
-
87 N
-
150 N
-
170 N
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260 N
-
300 N
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