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Gravitational Review PowerPoint PPT Presentation

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.

Gravitational Review

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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 = mgc.w = g/m

• b.w = m/gd.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 ballc.a feather

• b.a bookd.All of the above

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

• a.distancec.mass

• b.accelerationd.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 = mgc.w = g/m

• b.w = m/gd.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 ballc.a feather

• b.a bookd.All of the above

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

• a.distancec.mass

• b.accelerationd.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.