Circular Motion and Universal Gravitation Quizzes

See how ready you are for a circular motion, torque, or universal gravity assessment. Take out quizzes and the click on the links to subject matter for remediation.

Universal Gravitation Practice Quiz

Universal Gravitation Quiz

1 / 11

How is the force of gravity related to mass?

inversely squared

inversely

directly

2 / 11

How is the force of gravity related to distance between object?

inversely squared

directly

inversely

3 / 11

What does a G having a value of 6.67 x 10^-11 tell you about the force of gravity between any two object?

It is very weak

it is always 9.8 m/s/s

It is very strong

G is a very small number 0.0000000000667 and therefore it takes huge masses like planets to feel the attraction to something. You cant feel the attraction to your neighbor, but there is one. You can feel the attraction to earth.

4 / 11

What would happen to the force of gravity if you tripled the distance between the objects?

double the force

triple the force

one ninth the force

one third the force

5 / 11

What would happen to the force of gravity if you doubled the mass of one object?

double the force

triple the force

one ninth the force

one third the force

6 / 11

What would happen to the force of gravity if you doubled the mass of one object and doubled the distance?

nine times

double the force

one half the force

one fourth the force

7 / 11

What is the force of gravity between 96kg Joe and 87kg Jim when the distance between them is 0.20 meters?

2.79 x 10^-6 N

1.87 x 10^4 N

4.79 x 10^-3 N

1.39 x 10^-5 N

8 / 11

Which graph correctly shows how mass relates to force using the Law of Universal Gravitation?

Mass is in the numerator of the force of gravity equation below and directly related to the force of gravity. If the mass doubles, the force of gravity would double.

9 / 11

Which graph correctly shows how distance relates to force using the Law of Universal Gravitation?

Distance is in the denominator and squared in the universal gravitation equation below. There is a inverse squared relation. Force decreases not proportionately more early since the d is squared. If you double distance the force goes down to 1/4.

10 / 11

What is your mass if the attractive force from the 55 kg person 2.0 meters across the table is 4.586 x 10^-8 N? (when rounded to two significant figures)

340000 kg

25 kg

63 kg

150000 kg

50 kg

11 / 11

What is the force of attraction between Isaac Newton and his 0.15 kg apple the moment it is 0.3 meters away if his weight was 83.6 kg?

140 N

2.8 x 10^-9 N

9.3 x 10^-9 N

40 N

Your score is

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Circular Motion Quiz

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Circular Motion Quiz

1 / 10

What happens to tangential velocity if you increase the radius?
It _________

decreases

stays the same

increases

2 / 10

The time it takes for one rotation is the ___________.

radius

displacement

frequency

period

The period is the time it takes for an event that occurs over and over to happen. In this case it is time to travel in a circle

3 / 10

The number of rotations per time is the ___________.

radius

period

displacement

frequency

Frequency is the number of rotations per time and its unit is Hz or rotations per second

4 / 10

The inward force that causes circular motion is _________________.

centrifugal force

round force

normal force

centripetal force

Inertia makes an object want to go forward at a constant rate if in motion. Centripetal force pulls that object inwards making its motion circular.

5 / 10

How would a ball travel if you were spinning a ball on a rope above your head and the rope broke?

directly forward tangent to the circle

directly outward from the center of the circle

inwards to the center of the circle

in and outwards repeditively

The ball will keep on going straight when there is not a centripetal force pulling it in. Straight from the outside of the circle is called tangent. So it would go straight ahead tangent to the circle.

6 / 10

Why would a coffee cup sitting on your car fall off when taking a quick a turn?

centripetal force makes it want to go forward

inertia makes it want to continue forward

centripetal force makes it want to go backward

inertia makes it want to go backward

Its inertia makes it keep on going forward as the car is turning

7 / 10

What will happen to the centripetal force required to keep an object going in a circle if the mass of the object is doubled and the radius of the circle is cut in half?

It would become ___________ times the original.

four

half

two

one

8 / 10

What will happen to the centripetal force required to keep an object going in a circle if mass, radius, and velocity are all doubled?

It would become ___________ times the original.

two

four

one

half

9 / 10

What is the tangential velocity of a 50 kg girl is bicycling in circles with a radius of 5.00 m when it takes 12 s to make one rotation?

2.6 m/s

8.3 m/s

4.9 m/s

1.2 m/s

10 / 10

What is the centripetal force of a 50 kg girl is bicycling in circles with a radius of 5.00 m when it takes 12 s to make one rotation?

43 N

68 N

12 N

4.2 N

Your score is

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Torque Quiz

Do you know your torque?

Find out by taking this quiz.

1 / 9

What is the term for a pivot point where rotation can occur?

standard

base

fulcrum

lever

2 / 9

What is the term for the bar or arm attached to a pivot where a rotation can occur?

base

fulcrum

standard

lever

3 / 9

What happens to torque if you increase the distance a perpendicular force is applied on a lever from a fulcrum?

stays zero

decreases

increases

Ƭ = F_⟘d

Both perpendicular force and distance are directly related to torque

Increasing either increases the torque

4 / 9

What happens to torque if you increase the distance a parallel force is applied on a lever from a fulcrum?

increases

stays zero

decreases

Ƭ = F_⟘d

Both perpendicular force and distance are directly related to torque

Increasing either increases

Ƭ = F_⟘d

Both perpendicular force and distance are directly related to torque

Increasing either increases the torque

the torque

5 / 9

Which would give the most torque if all forces applied at point A, B, C, and D were the same?

D's force is directed parallel to the lever, therefore produces no torque (no torque)

C's torque is the greatest distance and completely perpendicular (most torque)

A and B's torque is less than C but greater than D. Without knowing the angle for B or actual distance for A you can't determine which of these two is greater.

6 / 9

Which would give the least torque if all forces applied at point A, B, C, and D were the same?

D's force is directed parallel to the lever, therefore produces no torque (no torque)

C's torque is the greatest distance and completely perpendicular (most torque)

A and B's torque is less than C but greater than D. Without knowing the angle for B or actual distance for A you can't determine which of these two is greater.

7 / 9

How much torque would be provided by a 15N force the direction of A above if it was 0.10 meters away from the bolt?

150 Nm ccw

150 Nm cw

1.5 Nm cw

1.5 Nm ccw

8 / 9

How far away should a 0.50 kg mass be placed on the left side of a fulcrum to balance a 2.0 kg mass 0.50 m on the right side of a fulcrum?

1.5 m

2.0 m

0.5 m

1.0 m

9 / 9

How far away should you place a 0.50 kg mass on the left side of a fulcrum to balance a 0.50 kg mass 0.10 meters and another 2.0 kg mass 0.50 m both on the right side of a fulcrum?

2.1 m

4.2 m

2.9 m

0.6 m

Your score is

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