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Physics Unit 5 Review: Motion in Two Dimensions

Total questions: 25

Worksheet time: 33mins

Name
Class
Date
1.

A ball rolls off a table and strikes the floor, as shown. If the time the ball spent in the air was 0.58 s, how fast did the ball leave the table? Use the distance in the X and the Speed equation.

a)

3.6 m/s

b)

1.2 m/s

c)

2.9 m/s

d)

0.99 m/s

2.

A skateboarder rolls off a bridge into the river as shown. If the skateboarder was originally moving at 7.0 m/s, how much time did the skateboarder spend in the air?

a)

1.3 s

b)

0.79 s

c)

38.5 s

d)

0.70 s

e)

Not enough information given.

3.
Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a velocity of 3 m/s if the ball weighs .12 kg and her arm is .65 meters long.
a)
.38
b)
1.23
c)
.55
d)
1.66 N
4.
A horse gallops around a circular arena.  The centripetal force on the horse is ___.
a)
directed outward
b)
tension
c)
directed toward the center of the arena
d)
9.8 N
5.

In a horse race around a large circular track, which has to have the greater linear speed, a horse near the inside rail or a horse near the outside rail?

a)

The outside

b)

The inside

c)

They travel at the same linear speed

6.

What is the direction of the force that acts on clothes in the spin cycle of a washing machine?

a)

outward

b)

inward

c)

up

d)

down

7.

The graph shows the displacement vs. time for a SHM. What is the amplitude of oscillations?

a)

4 m

b)

4 s

c)

-1 m

d)

1 m

e)

0

8.

A pair of trapeze performers at the circus is swinging from ropes attached to a large elevated platform. Suppose that the performers can be treated as a simple pendulum with a length of 16 m. Determine the period for one complete back and forth cycle. (Useful equations are on the board).

a)

2 sec

b)

12 sec

c)

8 sec

d)

10 sec

9.
Pendulum "A" is on Jupiter Pendulum "B" is on the Moon.  The Moon has less gravity than  Jupiter the pendulums have the same mass and length.  Which Pendulum is moving faster?
a)
A
b)
B
c)
Same
10.
Pendulum "A" is on Jupiter Pendulum "B" is on the Moon.  The Moon has less gravity than  Jupiter the pendulums have the same mass and length.  Which Pendulum has the greater period?
a)
A
b)
B
c)
Same
11.

When you drop a hammer and a feather on the moon what will happen? There is no air on the moon.

a)

They will hit at the same time

b)

The hammer will hit first

c)

The feather will hit first

12.
Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of 3.5 m/s2.
a)
2.4 m/s
b)
3.6 m/s
c)
3.9 m/s
d)
4.2 m/s
13.
Calculate the length of an arc with radius 15 cm and central angle of 30°.
a)
450 cm
b)
5π/2 cm or ≈ 7.9 cm
c)
225 cm
d)
5π/4 cm or ≈ 3.9 cm
14.

Assume this spring is in simple harmonic motion.

Which position is velocity at minimum?

a)

1

b)

2

c)

3

d)

2 & 3

15.

Which position has zero velocity?

a)

A

b)

B

c)

C

d)

A & C

16.
Which of the following is a true statement regarding springs?
a)
The higher the value of the spring constant, the stiffer the spring.  
b)
In Hooke's law, the force exerted by the spring acts in the same direction as displacement.  
c)
Springs are designed to provide unpredictable variations in force.  
d)
The force exerted by a spring has a quadratic relationship with the displacement form equilibrium.  
17.
According to Wikipedia (and as of this writing), Tim Ahlstrom of Oconomowoc, WI holds the record for hand clapping. He is reported to have clapped his hands 793 times in 60.0 seconds.What is the frequency of Mr. Ahlstrom's hand clapping during this 60.0-second period?
a)
13.2 Hz
b)
25.1 Hz
c)
26.3 Hz
d)
17.2 Hz
18.
Batman and Robin swing from ropes attached to a large elevated platform. Suppose that they can be treated as a simple pendulum with a length of 16 m. Determine the period for one complete back and forth cycle.
a)
16 s
b)
4 s
c)
8 s
d)
6 s
19.

The spring constant K = 500 N/m and the block's mass is m = 2 kg. What is the acceleration a = ? where x = 0.02 m?

a)

5 m/s2

b)

-5 m/s2

c)

0.04 m/s2

d)

1000 m/s2

20.

The graph shows the displacement vs. time for a SHM. What is in seconds the period of oscillations?

a)

0

b)

1

c)

2

d)

3

e)

4

21.
The period of a pendulum may be decreased by
a)
Increasing the mass of the bob
b)
moving the equilibrium point
c)
decreasing the mass of the bob
d)
shortening the length of pendulum
22.

A plane flying horizontally at 120 m/s drops a crate. When the crate strikes the ground 15 seconds later, what is the magnitude of the horizontal component of its velocity?

a)

147 m/s

b)

120 m/s

c)

1800 m/s

d)

8 m/s

23.
A wrench is used to tighten a nut. A 15N perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the torque applied to the wrench?
a)
7.5 Nm
b)
1.5 Nm
c)
750 Nm
d)
150 Nm
24.
A pendulum is 0.75 meters long and has a period of 4.17 seconds. The Pendulum is on an unknown planet.  What is the gravity of the Unknown Planet?
a)
9.8
b)
3.4
c)
1.7
d)
Greater than 9.8
25.

A gear spins at a rate of 400 revolutions/minute. Which choice is closest to its angular speed in radians/second?

a)

6.67 rad/s

b)

2500 rad/s

c)

41.9 rad/s

d)

20.9 rad/s

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