Free Printable Physics Q2CA3

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Physics Q2CA3

Total questions: 20

Worksheet time: 22mins

Name

Class

Date

You put a ball on the end of a string. You swing the ball with a rotation speed of 5.6 m/s. The mass of the ball is 2.0 kg. The length of the string is 1.60 m.

Calculate the centripetal acceleration in terms related to g.

What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?

5 m/s²

17.63 m/s²

10 m/s²

8.81 m/s²

Which represents the acceleration of the ball?

A horse gallops around a circular arena. The centripetal force on the horse is ___.

directed outward

tension

directed toward the center of the arena

9.8 N

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.

.38

1.23

.55

1.66 N

You drop a banana. What is the banana's velocity after 10 seconds?

-10 m/s

-100 m/s

-98 m/s

-9.8 m/s

What is the vertical acceleration of a projectile?

0 m/s²

9.8 m/s² down

4.9 m/s²down

12 m/s down

If I double the distance between two objects, what happens to their gravitational Force?

4x bigger

4x smaller

2x bigger

2x smaller

Which of the following would be a proper setup for this problem: A 60 kg person is standing on earth's surface (radius = 6.4x10⁶ m). The mass of earth is 6x10²⁴kg.

$\frac{\left(6.67x10^{-11}\right)\left(60\right)\left(6x10^{24}\right)}{\left(6.4x10^6\right)^2}$

$\frac{\left(6.67x10^{-11}\right)\left(60\right)\left(6.4x10^6\right)}{\left(6x10^{24}\right)^2}$

$\frac{\left(6.67x10^{-11}\right)\left(60\right)\left(6x10^{24}\right)}{\left(6.4x10^6\right)^{ }}$

$\frac{\left(60\right)\left(6x10^{24}\right)}{\left(6.4x10^6\right)^2}$

10.

If two objects are brought closer to 1/2 the original distance, by what factor would the gravity force between them change?

1/2 as much

2 x as much

4 x as much

1/4 as much

11.

Calculate the gravitational force between two objects when they are 0.750m apart. Each object has a mass of 5.00kg.

2.96x10^-7N

3.00x10^-6N

2.22x10^-9N

2.23x10^-8N

12.

What states that "every object in the universe attracts every other object"?

Law of Universal Gravitation

Newton's First Law of Motion

My mother

Inertia & gravity

13.

Projectile A is fired with a velocity of 20 m/s off a 20 m cliff, while projectile B is fired with a velocity of 40 m/s off a 10m cliff. Which statement best describes the time of flight of projectile B as compared to projectile A?

Projectile B is in the air a longer time than projectile A,

Projectile B is in the air less time than projectile A.

Projectile B in the air for the same amount of time as projectile A.

Can not be compared.

14.

At the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first?

Neither- they hit at the same time

the horizontally thrown ball

the dropped ball

None of these

15.

An apple hangs on a tree on the Earth. Which of the following statements is correct?

The force on the apple is greater than the force on the Earth because the Earth is more massive.

The forces on the apple and the Earth are zero because they are not touching each other.

The force on the apple is less than the force on the Earth because the tree is supporting the apple.

The forces on the apple and Earth are equal.

16.

The story that Isaac Newton was hit on the head by an apple is said to be 'apocryphal'. What does apocryphal mean?

likely untrue

of verified origin

a story with a moral

an ironic story

17.

The definition of gravitational field strength is:

The region of space surrounding a body where other bodies will feel an attractive force due to it.

The region of space surrounding a body where other bodies will feel an repulsive force due to it.

The region of space surrounding a charge where other charges will feel an attractive force due to it.

The region of space surrounding a charge where other charges will feel an repulsive force due to it.

18.

Suppose a body of large mass is close to a body of small mass. Which statement correctly describes the force due to gravity in this system?

The small body alone experiences a force.

Both bodies experience a force of equal magnitude.

Each body experiences a different force in proportion to its mass.

Each body experiences a different force in proportion to the square of its radius.

19.

What happens to the force of gravity between 2 objects if the distance is cut in half?

1/4F

1/2F

20.

Select all that apply. When on the surface of Earth, we only consider g = GM/r² = 9.8 N/m. This is because

the Earth is the only mass that is generating a gravitational field

the Earth generates a gravitational field that is approximately 9.8 N/m

every mass that we see generates a gravitational field, pulling us toward them, but are much smaller and negligible compared to the gravitational field of Earth

Mars has a gravitational field strength of 0.375 N/m near its surface

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Physics Q2CA3

Total questions: 20

Worksheet time: 22mins

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