Answers2003390-Physics 1 Honors Sem. 1 - PetersEarth-Moon-Sun System

Earth-Moon-Sun System — Unit test Answers

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1
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In the equation for the gravitational force between two objects, what does G represent?

A
the gravitational constant
B
the gravitational force
C
the gravitational field strength
D
the gravitational acceleration
2
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An object is represented by the dot on the motion map.

Question illustration
A
a car driving over the top of a hill
B
a ball on a string that stopped at the top of a vertical loop
C
a roller coaster car at the top of a vertical loop of track
D
a bug on the top of a rolling hula hoop
3

The orbital period of a satellite is 2 × 106 s and its total radius is 2.5 × 1012 m. The tangential speed of the satellite is m/s. (Round to the nearest whole number, do not add any punctuation.)

Answer not available
4

What did Johannes Kepler contribute to the study of planets?

A
He formulated the universal law of gravitation.
B
He identified the first moons of Jupiter.
C
He collected detailed data that led to the proposal of the heliocentric model.
D
He provided mathematical support for the heliocentric model.
5

The pitcher on a softball team starts a windup to throw a pitch, as shown.Note: In softball, the ball is pitched underhand in a circular motion in the direction of the arrow.

Question illustration
A
W
B
X
C
Y
D
Z
6

Following an inelastic collision, what can kinetic energy be converted into? Check all that apply.heatimpulsemomentumpotential energysound

A
heat
B
impulse
C
momentum
D
potential energy
E
sound
7

The image shown is an illustration of Kepler’s second law.

Question illustration
A
The gravitational force at W is less than the gravitational force at Y.
B
The time needed to travel from W to X is the same as the time needed to travel from Y to Z.
C
The gravitational force at W is the same as the gravitational force at Y.
D
The time needed to travel from W to X is greater than the time needed to travel from Y to Z.
8

Hakeem wants to explain why only one side of the moon is visible from Earth. Which comparison would provide the best support?

A
the orbital period of Earth with the rotational period of the moon
B
the orbital period of the moon with the rotational period of the moon
C
the orbital period of the moon with the rotational period of the Earth
D
the orbital period of Earth with the orbital period of the moon
9

A bicycle tire has a radius of 0.23 m. The tire spins at a constant speed with a centripetal acceleration of 42 m/s2.

A
3.1 m/s
B
6.5 m/s
C
9.7 m/s
D
14 m/s
10

Cecelia dropped a ball from a height of 2 m. The ball fell in a straight path down to the ground.

A
tossing it horizontally at a slower speed
B
tossing it horizontally at a faster speed
C
dropping it from a shorter distance
D
dropping it from a greater distance
11

A cyclist rides at a constant speed of 4.5 m/s around a curve. If the centripetal acceleration is 29 m/s2, what is the radius of the curve?

A
0.16 m
B
0.70 m
C
6.4 m
D
34 m
12

A large truck is moving at 22.0 m/s. If its momentum is 125,000 kg • , what is the truck's mass?

Question illustration
A
176 kg
B
2750 kg
C
5680 kg
D
11,400 kg
13

Which statement is supported by Kepler’s laws?

A
The closer a planet is to the Sun, the faster it moves.
B
The farther a planet is from the Sun, the faster it moves.
C
As a planet moves away from the Sun, its gravitational force increases.
D
As a planet moves away from the Sun, its gravitational force remains the same.
14

A child on a spinning ride at a playground has a centripetal acceleration of 0.80 m/s2. The child completes a full circle every 4.2 s.

A
0.068 m
B
0.085 m
C
0.27 m
D
0.36 m
15

In the equation for centripetal force, which expression represents the centripetal acceleration of the object?

A
mv2
B
StartFraction m over r EndFraction
Option B
C
StartFraction v Superscript 2 Baseline over r EndFraction
Option C
D
StartFraction m times v Superscript 2 Baseline over r EndFraction
Option D
16

The gravitational force between two asteroids is 6.2 × 108 N. Asteroid Y has three times the mass of asteroid Z.

A
3.7 × 1015 kg
B
1.1 × 1016 kg
C
1.4 × 1031 kg
D
4.1 × 1031 kg
17

An object moving in a circle is represented by the motion map.

Question illustration
A
W
B
X
C
Y
D
Z
18

A student is working in a lab to determine how time affects impulse. The student keeps the force the same in each trial but changes the impact time. Some data is shown.

Question illustration
A
trial 1
B
trial 2
C
trial 3
D
trial 4
19

A lab cart with a mass of 15 kg is moving with constant velocity, v, along a straight horizontal track. A student drops a 2 kg mass into it from directly above, and the cart continues moving.

A
15vi + 2vf= 15(0)+ 2vi
B
15vi + 2(0) = 15vf + 2(0)
C
15vi + 2(0) = (15 + 2)vf
D
15(0) + 2vi = (15 + 2)vf
20

The table shows data for the planet Uranus.

Question illustration
A
170 N
B
218 N
C
430 N
D
532 N

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