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7.1 2 rotation and gravity GAME QUESTIONS

Total questions: 61

Worksheet time: 1hrs 18mins

Name
Class
Date
1.

True or False: Humans are very close to developing a full sized habitat in space where humans can live indefinitely.

a)
True
b)
False
2.

What are the shapes they plan on using for the Texas A & M habitat?

a)
squares
b)
cylinders
c)
hexagons
d)
pentagons
e)
octagons
3.

Why is weak gravity a problem in a space habitat?

a)
bone density loss
b)
fluid loss
c)
blood loss
d)
ear infections
4.

How can we simulate gravity in space?

a)
rotation
b)
graviton particles
c)
quarks
d)
gluons
e)
sticky boots
5.

True or False: If the radius of the habitat is too small, gravity will feel different between your head and your feet.

a)
True
b)
False
6.
4 RPM is a
a)
rotational speed
b)
linear speed
7.
True or False: Greater than 4 RPM causes motion sickness.
a)
True
b)
False
8.
What is wrong with long-term radiation exposure?
a)
cancer risk
b)
we'll probably become Dr. Doom
c)
we'll be too tan and wrinkly
d)
bone density loss
9.

The center of the cylindrical space habitat would be the best place for a

a)
zero gravity workshop
b)
farm
c)
meat plant
d)
bed
10.

What is the variable for angular speed?

a)

ω\omega

b)

Δθ\Delta\theta

c)

Δt\Delta t

d)

vv

e)

rr

11.

What is the variable for linear speed? (how fast you are walking)

a)

ω\omega

b)

Δθ\Delta\theta

c)

Δt\Delta t

d)

vv

e)

rr

12.

What are the SI units for angular speed?

a)

rad/s

b)

rad

c)

s

d)

m/s

e)

m

13.

What are the SI units for angular acceleration?

a)

rad/s2

b)

rad/s

c)

s

d)

m/s2

e)

m

14.

What are the SI units for centripetal acceleration?

a)

rad/s2

b)

rad/s

c)

s

d)

m/s2

e)

m

15.

A carousel makes 18 revolutions in 2 minutes. How many revolutions per minute does it make? (What is its angular speed in rpm?)

a)

3 rpm

b)

6 rpm

c)

9 rpm

d)

12 rpm

16.

A car is rounding a bend as shown in the diagram. Which arrow correctly shows the direction of the car's velocity?

a)

A

b)

B

c)

C

d)

D

17.

Which vector represents the centripetal acceleration of the ball?

a)

A

b)

B

c)

C

d)

D

18.

An object moves in a perfect circle on the end of a string.  If the string breaks, which letter represents the direction in the object would move in at that instant?

a)

A

b)

B

c)

C

d)

D

19.

A car with mass m travels around a curve with velocity v. What do you know about the centripetal force if the radius doubles?

Fc=mv2rF_c=\frac{mv^2}{r}

a)

Force remains the same

b)

Force doubles

c)

Force divides by 2

d)

Force divides by 4

e)

Force quadruples

20.

A car with mass m travels around a curve with radius r. What do you know about the centripetal force if the linear speed of the car doubles?

Fc=mv2rF_c=\frac{mv^2}{r}

a)

Force remains the same

b)

Force doubles

c)

Force divides by 2

d)

Force divides by 4

e)

Force quadruples

21.

2 BASE QUESTION: A 50-kg child is on a Gravitron ride where she is 8 m from the center.
If the ride spins at 2 rad/s, what centripetal force is on the child?

Answer: ​ ​ ​ (a)  

Choose from the below words
200 N
500 N
1400 N
1600 N
2000 N
25 N
50 N
22.

If you are sitting on a carousel that is going a constant angular speed (ω)\left(\omega\right) and you increase your distance from the center (r), what happens to your centripetal acceleration?

ac=mω2ra_c=m\omega^2r

a)

increases

b)

remains the same

c)

decreases

23.

HOME RUN QUESTION: Mass m1 is moving in a circle and holding up m2. Mass m1 is 2 kg, the radius r is 4 m, and the weight of m2 is 18 N. What linear speed must m1 move to hold up m2?

24.

TRIPLE QUESTION: Mass m1 is moving in a circle and holding up m2. Mass m1 is 2 kg, the radius r is 4 m, and the linear speed of m1 is 8 m/s. What is the weight of m2 in N?

25.

DOUBLE QUESTION: Mass m1 is moving in a circle and holding m2 up at rest. If m1 starts moving at a higher linear speed, what will happen to m2?

a)

it will go up

b)

it will go down

c)

it will stay at rest

26.

Gravity is an example of which kind of force?

a)

contact

b)

field

c)

speed

d)

direction

27.

Newton's Universal Law of Gravitation claims that the attraction between objects with mass depend on what 2 things?

a)

volume and height

b)

velocity and height

c)

acceleration and mass

d)

mass and distance

28.

Which planet has the weakest gravitational pull?

a)

Earth

b)

Mercury

c)

Jupiter

d)

Venus

29.

Match the following quantities with their correct units

a)

mass

1.

kg

b)

velocity

2.

m/s

c)

acceleration

3.

m/s2

d)

radius

4.

m

e)

Weight

5.

N

30.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
31.
Which model has greater gravitational attraction (if any)
a)
Model A
b)
Model B
c)
Both Model A and Model B (same gravity)
32.

The moon rotates.

a)

True, about 1 time per month

b)

False

c)

True, about 1 time every 3 months

d)

True, about 1 time per year

33.

Describe the line's relationship to point P and the circle.

a)

tangent

b)

sine

c)

cosine

d)

chord

e)

cotangent

34.

9.8 m/s2 is

a)

the acceleration due to gravity

b)

the force of gravity

c)

always positive

d)

the force of gravity for all planets

35.

This is a top view of the Earth going around the Sun. The green vector is the​ (a)   and the blue vector on the Earth is the ​ (b)   from the ​ (c)   .

Choose from the below words
linear speed
force of gravity
Sun
Moon
36.

Top picture is A, middle is B, and bottom is C. Each blue vector is the force of gravity. Which picture shows the greatest force of gravity?

a)

A

b)

B

c)

C

d)

Force of gravity is the same amount in all of them

37.

The force of gravity is the blue vector on each object. What happens to the force when the objects get farther apart?

a)

The force decreases

b)

The force increases

c)

The force is the same amount in all of them

38.

The force of gravity is the blue vector on each object. What do you notice about the force on the Sun and the force on the Earth?

a)

The forces are the same

b)

The force on the Earth is always bigger

c)

The force on the Sun is always bigger

d)

Both forces are on the same object

39.

The blue vectors are the force of gravity and the green vectors are linear speed of Earth. These show a top view of the orbit I made in different parts of the orbit. What happens in this orbit?

a)

The linear speed is higher when the Earth is closer to the Sun.

b)

The linear speed is always the same in this orbit.

c)

The linear speed is lower when the Earth is closer to the Sun.

40.

An example of an inverse square is y=1r2y=\frac{1}{r^2} . If r increases, what happens to y?

a)

y decreases

b)

y increases

c)

y remains constant

41.

An example of an inverse square is y=1r2y=\frac{1}{r^2} . If r doubles, what happens to y?

a)

y is divided by 4

b)

y is divided by 2

c)

y is multiplied by 4

d)

y is multiplied by 2

e)

y remains constant

42.

An example of an inverse square is y=1r2y=\frac{1}{r^2} . If r triples, what happens to y?

a)

y is divided by 9

b)

y is divided by 3

c)

y is multiplied by 9

d)

y is multiplied by 3

e)

y remains constant

43.

If you are on the Moon, you will experience the feeling of some gravity.

a)

True

b)

False

44.

Which of these graphs is y = 1/x2 ?

a)

b)

c)

d)

45.

The Sun exerts a larger force of gravity on the Earth than the Earth exerts on the Sun.

a)

True

b)

False, the Earth exerts a larger force on the Sun

c)

False, the forces are the same

46.

Newton's third law states that when you push on an object, that object ______.

a)

pushes back with equal force

b)

pushes back with less force

c)

pushes back with more force

d)

accelerates

47.

A grindstone spinning at the rate of 8.3 rev/s has what approximate angular speed?

a)

8.3 rad/s

b)

16.6 rad/s

c)

52 rad/s

d)

81 rad/s

48.

The reason you feel thrown out of a curve is because of this property called (a)   .

49.

The equation for circumference is

a)

2πr2\pi r

b)

2π2\pi

c)

2πt\frac{2\pi}{t}

d)

2πd2\pi d

50.

The bobbers in the jars spun in a circle went

a)

towards the center

b)

towards the outside

c)

towards the front of the jar the way the jars spun

51.

The bobbers in the jars spun in the circle went towards the center because that's

a)

the direction of acceleration

b)

the direction of the linear speed

c)

the direction the water went

d)

the direction the jars went

52.

The helium balloon went forwards in the car when ______.

a)

the car accelerated forward

b)

the car accelerated backward

c)

the car turned left

d)

the car turned right

53.

The Earth has seasons. Which motion of the Earth causes seasons?

a)

revolution

b)

rotation

54.

The Earth ________ on its axis.

a)

rotates

b)

revolves

55.

How long does the earth's revolution last?

a)

346.25 days

b)

24 hours

c)

365.25 days

d)

29 days

56.

The sun rises in the ​ (a)   and

sets in the ​ (b)   .

Choose from the below words
east
west
north
south
57.

What season is the northern hemisphere experiencing in this picture?

a)

summer

b)

fall

c)

winter

d)

spring

58.

What season is the northern hemisphere experiencing in the photo?

a)

Fall

b)

Spring

c)

Winter

d)

Summer

59.
When the Northern Hemisphere of Earth is Leaning away from the Sun, What season is the Southern Hemisphere experiencing?
a)
Summer
b)
Winter
c)
Spring
d)
Fall
60.
Why is it warmer in the summer?
a)
Closer to the sun
b)
More direct light from Earth's tilt
c)
Stronger light from the sun
d)
Earth spins slower
61.

As seen from above the north pole, which way does the Earth rotate?

a)

counterclockwise

b)

clockwise

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