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Physics Quiz 1 Practice
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Gravity
Terms in this set (15)
Which of the following is NOT a derived unit?
a. m
b. m/s2
c. m3
d. m/s
e. m2
a. m
What happens to the period of a pendulum as its frequency is increased?
a. the period decreases
b. more information is needed to determine the answer.
c. the period increases
d. the period will increase or decrease, depending on the original value of the frequency.
e. the period remains constant
a. the period decreases
A child on a swing swings back and forth 25 times in 35 seconds. What is the frequency of the swing?
a. 0.71 Hz
b. 35 Hz
c. 0.029 Hz
d. 25 Hz
e. 1.4 Hz
a. 0.71 Hz
A child on a swing swings back and forth 25 times in 35 seconds. What is the period of the swing?
a. 0.71 s
b. 25 s
c. 1.4 s
d. 0.040 s
e. 35 s
c. 1.4 s
In which of the following cases will the average speed and average velocity have different values?
a. A car traveling at a speed of 25 m/s slows down to a stop in 10 s.
b. A car travels to the east, then turns around and travels to the west.
c. A car starts from rest and speeds up to a speed of 25 m/s in 10 s.
d. A car starts from rest and speeds up to a speed of 25 m/s, then travels at this speed for 1 hour.
e. A car traveling at a speed of 25 m/s slows down to 15 m/s, then speeds up again to a speed of 25 m/s.
b. A car travels to the east, then turns around and travels to the west.
Which of the following is an example of a vector quantity?
a. 50 m/s
b. 50 m/s2
c. 50 m
d. 50 km/h [North]
e. 50 km/h
d. 50 km/h [North]
A car is said to have a velocity of -25 m/s. What does the negative sign indicate?
a. The car is traveling in the negative direction.
b. It indicates nothing.
c. The car's velocity is increasing.
d. The car's velocity is decreasing.
e. The car is traveling in the positive direction.
a. The car is traveling in the negative direction.
An escalator at a shopping mall moves with a velocity of 1.2 m/s [upwards] relative to the mall. A person on the escalator walks with a velocity of 1.0 m/s [upwards] relative to the escalator. What is the resultant velocity of the person relative to the mall?
a. 1.0 m/s [upwards]
b. 2.2 m/s [upwards]
c. 1.2 m/s [upwards]
d. 0.2 m/s [downwards]
e. 0.2 m/s [upwards]
b. 2.2 m/s [upwards]
An escalator at a shopping mall moves with a velocity of 1.2 m/s [upwards] relative to the mall. A person on the escalator walks with a velocity of 1.0 m/s [downwards] relative to the escalator. What is the resultant velocity of the person relative to the mall?
a. 1.0 m/s [downwards]
b. 1.2 m/s [downwards]
c. 2.2 m/s [downwards]
d. 0.2 m/s [upwards]
e. 0.2 m/s [downwards]
d. 0.2 m/s [upwards]
In which of the following cases is the car NOT accelerating?
a. the car travels at a constant speed while going around a turn.
b. the car travels at a constant speed on a straight road.
c. the car slows down to a stop.
d. the car slows down while going around a turn.
e. the car speeds up from rest.
b. the car travels at a constant speed on a straight road.
Which statement is always true for an object while it is freely falling? (Assume it starts from rest).
a. it will change its speed by 9.8 m/s during each second that it falls.
b. it will fall with a speed of 9.8 m/s.
c. it will fall a distance of 9.8 m during each second that it falls.
d. it will reach a maximum speed of 9.8 m/s.
e. it will fall a distance of 9.8 m in the first second.
a. it will change its speed by 9.8 m/s during each second that it falls.
A driver travels around a circular turn of radius "r" at a speed of 10 m/s. How does the centripetal acceleration compare if she then drives around the same turn at a speed of 30 m/s?
a. it is three times larger in the second case.
b. it is nine times larger in the second case.
c. it is three times smaller in the second case.
d. it is the same in each case.
e. it is nine times smaller in the second case.
b. it is nine times larger in the second case.
With reference to the distance versus time graphs in the figure below:
what is the shape of the corresponding speed versus time graph for the same motion?
a. a horizontal line.
b. a line curving upwards.
c. a straight line sloping downwards.
d. a straight line sloping upwards.
e. a line curving downwards.
a. a horizontal line.
A car is traveling at a constant velocity of +25 m/s along a straight road. What is the shape of its distance versus time graph?
a. a straight line sloping downwards.
b. a straight line sloping upwards.
c. a horizontal line.
d. a line curving upwards.
e. a line curving downwards.
b. a straight line sloping upwards.
A car is traveling at a constant velocity of +25 m/s along a straight road. What is the shape of its velocity versus time graph?
a. a horizontal line.
b. a line curving downwards.
c. a straight line sloping downwards.
d. a line curving upwards.
e. a straight line sloping upwards.
a. a horizontal line.
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