gravitational review

GRAVITATIONAL REVIEW

1. Gravity is continuously applied to an object, causing it to accelerate. After a period of time, however, the object stops accelerating. What conclusion can be drawn? a. The mass of the object has increased. b. Gravity on the object has increased. c. The object reached terminal velocity. d. The momentum of the object has

reached a maximum.

2. Of the following, the greatest gravitational force would occur between a. a marble and a baseball 5 meters

apart. b. a loaded freighter on the high seas and

Earth. c. the moon and an astronaut standing on

the moon. d. the moon and Earth.

3. Which of the following equations is correctly showing the relationship between mass, weight and gravitational force?

a. w = mg c. w = g/m b. w = m/g d. w = g + m

4. When gravitational forces and air resistance equalize on an object that is falling toward Earth and the object stops accelerating, what is the velocity of an object called?

a. resultant velocity c. instantaneous velocity b. terminal velocity d. average velocity

5. In the absence of air resistance, how would the acceleration of a 1.5 kg book and the acceleration of a 15 kg rock differ if the objects were dropped from the same height?

a. The book would accelerate twice as fast as the rock.

b. The rock would accelerate twice as fast as the book.

c. The book would accelerate ten times as fast as the rock.

d. They would not differ; they would be the same

6. What happens immediately after a sky diver opens her parachute? a. Air resistance greatly increases. b. The sky diver is in free fall. c. The sky diver’s speed greatly

increases. d. The force of gravity greatly increases.

7. The gravitational force between two objects depends on masses of objects and

a. accelerations of objects. c. speeds of objects. b. distance between objects. d. sizes of objects.

8. Which of the following objects exerts a gravitational force?

a. a bowling ball c. a feather b. a book d. All of the above

9. Increasing which of these conditions results in more gravitational force between two objects?

a. distance c. mass b. acceleration d. surface area

10.When an object is in free fall, the only force acting on it is

a. gravity. c. inertia. b. friction. d. terminal velocity.

11. Free-fall acceleration on the moon a. depends on an object’s weight. c. depends on an object’s mass. b. is the same for all objects. d. All of the above.

12. Orbital motion is a combination of a. mass and friction. c. acceleration and gravity. b. forward motion and free fall. d. weight and vertical velocity.

13. Which statement about weight is incorrect?

a. An object weighs more on the moon than it weighs on Earth.

b. A change in an object’s location can change the object’s weight.

c. An object’s weight is directly proportional to its mass.

d. The weight of an object depends on gravity.

14. Astronauts “float” when inside an orbiting spaceship because they are

a. weightless. c. in free fall. b. in a vacuum. d. outside Earth’s gravity.

15. When air resistance balances the weight of a falling object, the velocity

a. slowly decreases. c. rapidly increases. b. remains constant. d. None of the above

16. Weight is best described as a. an object’s resistance to acceleration. b. what causes an object to fall. c. the downward force exerted on an

object due to gravity. d. a force solely dependent on an object’s

mass.

17. Which of the following units is used to measure acceleration?

a. m/s c. m/s2

b. m ● s d. m2/s2

18. Which of the following is true? a. Weight and mass are proportional but

not equal. b. Weight is gravitational force an object

experiences due to its mass. c. The weight of an object on Earth is

greater than the weight of the same object on the moon, but the object’s mass stays the same.

d. All of the above

19. Near Earth’s surface, the strongest gravitational force would occur between an elephant and

a. the sun. c. a cat. b. the moon. d. Earth.

20. When an object travels in a circular or nearly circular path around another object, the object is said to be in

a. a circle. c. orbit. b. free fall. d. collision.

21. When completing the Orbital Motion Lab, you found that

a. Objects with larger orbits travel at a faster speed than objects with smaller orbits.

b. Objects with larger orbits travel at a slower speed than objects with smaller orbits.

c. Objects with larger orbits travel the same speed as objects with smaller orbits.

d. None of the above.

GRAVITATIONAL REVIEW

1. Gravity is continuously applied to an object, causing it to accelerate. After a period of time, however, the object stops accelerating. What conclusion can be drawn? a. The mass of the object has increased. b. Gravity on the object has increased. c. The object reached terminal velocity. d. The momentum of the object has

reached a maximum.

2. Of the following, the greatest gravitational force would occur between a. a marble and a baseball 5 meters

apart. b. a loaded freighter on the high seas and

Earth. c. the moon and an astronaut standing on

the moon. d. the moon and Earth.

3. Which of the following equations is correctly showing the relationship between mass, weight and gravitational force?

a. w = mg c. w = g/m b. w = m/g d. w = g + m

4. When gravitational forces and air resistance equalize on an object that is falling toward Earth and the object stops accelerating, what is the velocity of an object called?

a. resultant velocity c. instantaneous velocity b. terminal velocity d. average velocity

5. In the absence of air resistance, how would the acceleration of a 1.5 kg book and the acceleration of a 15 kg rock differ if the objects were dropped from the same height?

a. The book would accelerate twice as fast as the rock.

b. The rock would accelerate twice as fast as the book.

c. The book would accelerate ten times as fast as the rock.

d. They would not differ; they would be the same

6. What happens immediately after a sky diver opens her parachute? a. Air resistance greatly increases. b. The sky diver is in free fall. c. The sky diver’s speed greatly

increases. d. The force of gravity greatly increases.

7. The gravitational force between two objects depends on masses of objects and

a. accelerations of objects. c. speeds of objects. b. distance between objects. d. sizes of objects.

8. Which of the following objects exerts a gravitational force?

a. a bowling ball c. a feather b. a book d. All of the above

9. Increasing which of these conditions results in more gravitational force between two objects?

a. distance c. mass b. acceleration d. surface area

10.When an object is in free fall, the only force acting on it is

a. gravity. c. inertia. b. friction. d. terminal velocity.

11. Free-fall acceleration on the moon a. depends on an object’s weight. c. depends on an object’s mass. b. is the same for all objects. d. All of the above.

12. Orbital motion is a combination of a. mass and friction. c. acceleration and gravity. b. forward motion and free fall. d. weight and vertical velocity.

13. Which statement about weight is incorrect?

a. An object weighs more on the moon than it weighs on Earth.

b. A change in an object’s location can change the object’s weight.

c. An object’s weight is directly proportional to its mass.

d. The weight of an object depends on gravity.

14. Astronauts “float” when inside an orbiting spaceship because they are

a. weightless. c. in free fall. b. in a vacuum. d. outside Earth’s gravity.

15. When air resistance balances the weight of a falling object, the velocity

a. slowly decreases. c. rapidly increases. b. remains constant. d. None of the above

16. Weight is best described as a. an object’s resistance to acceleration. b. what causes an object to fall. c. the downward force exerted on an

object due to gravity. d. a force solely dependent on an object’s

mass.

17. Which of the following units is used to measure acceleration?

a. m/s c. m/s2

b. m ● s d. m2/s2

18. Which of the following is true? a. Weight and mass are proportional but

not equal. b. Weight is gravitational force an object

experiences due to its mass. c. The weight of an object on Earth is

greater than the weight of the same object on the moon, but the object’s mass stays the same.

d. All of the above

19. Near Earth’s surface, the strongest gravitational force would occur between an elephant and

a. the sun. c. a cat. b. the moon. d. Earth.

20. When an object travels in a circular or nearly circular path around another object, the object is said to be in

a. a circle. c. orbit. b. free fall. d. collision.

21. When completing the Orbital Motion Lab, you found that

a. Objects with larger orbits travel at a faster speed than objects with smaller orbits.

b. Objects with larger orbits travel at a slower speed than objects with smaller orbits.

c. Objects with larger orbits travel the same speed as objects with smaller orbits.

d. None of the above.