# GKE: Gravity Question Preview (ID: 45556)

### A Review Of Gravity And Acceleration.[print questions] Answers? Play games to get them!

Planets A and B are both the same size, but planet B has three times the mass of Planet A. How does the weight of an object compare on the two planets?
a) The weight of an object is the same on both planets.
b) The weight of an object is three times larger on Planet A.
c) The weight of an object is three times larger on Planet B.
d) The weight of an object will depend on more factors than just the weight and size of the planet.

Two basketballs are sitting 1 m apart and not moving. Which best explains why the gravitational force between them does not make them move?
a) No gravitational force exists between the two objects because they are not touching.
b) The gravitational force between the two objects is weak because they are 1 m apart.
c) No gravitational force exists between the two objects because their masses are small.
d) The gravitational force between the two objects is weak because their masses are small.

Which pair of objects has the largest gravitational force?
a) marble and car
b) marble and baseball
c) car and bowling ball
d) There is no gravitational force between any of these pairs of objects.

What do we call the force that pulls objects toward each other?
a) mass
b) energy
c) gravity
d) acceleration

Why don't all objects fall at the same rate?
a) Because gravity constantly changes.
b) Objects do fall at the same rate.
c) Because of air resistance.
d)

What two factors affect the gravitational attraction between objects?
a) Mass and acceleration
b) Mass and distance
c) Weight and energy
d) Speed and distance

As the mass of an object decreases, the gravitational pull
a) increases
b) decreases
c) stays the same
d)

As distance between two objects decreases, the gravitational pull
a) increases
b) decreases
c) stays the same
d)

What is the constant rate of acceleration due to gravity?
a) 9.8 m/s2
b) 5.8 m/s2
c) 9.8 m/s
d) 32.8 m/s2

In daily life, all objects always fall at the same speed
a) True
b) False
c)
d)

If Steve throws the football 45 meters in 3 seconds, what is the average speed of the football?
a) 135 m/s
b) 15 m/s
c) 0.067 m/s
d) 48 m/s

Lindsay is late to class and is running down the hallway at a speed of 2 m/s. The length of the hallway is 150 meters. How long will it take her to run down the hallway?
a) 75 seconds
b) 300 seconds
c) 0.013 seconds
d) 152 seconds

Sarah swims at an average speed of 8 meters per second. How long will it take her to complete the race of 200 meters length?
a) 25 seconds
b) 0.04 seconds
c) 208 seconds
d) 1600 seconds

Two cars with different masses travel at the same speed down a hill toward a stop sign. What will happen when both cars apply brakes at the same time to stop?
a) Speed up
b) Slow down
c) Change direction
d) All of these

Which of the following can change an object’s acceleration?
a) The car with the smaller mass will require less force to stop than the car with the larger mass.
b) The car with the larger mass will maintain its velocity while traveling down the hill.
c) The car with the smaller mass will take longer to stop than the car with the larger mass.
d) The car with the larger mass will have less inertia than the car with the smaller mass.

How long will it take a truck traveling at 50 km/hr to reach a speed of 95 km/hr if it is accelerating at a rate of 5 km/hr/s?
a) 5 s
b) 12 s
c) 7 s
d) 9 s

What is the final speed of a vehicle that comes to a stop in 5 seconds?
a) 15 m/s
b) 10 m/s
c) 5 m/s
d) 0 m/s

A baseball is thrown a distance of 60 meters. What is its speed if it takes 0.5 seconds to cover the distance?
a) 120 m/s
b) 135 m/s
c) 140 m/s
d) 145 m/s

A driver starts his parked car and within 5 seconds reaches a speed of 60 km/h, as he travels east. What is his acceleration?
a) 8 m/s²
b) 10 m/s²
c) 12 m/s²
d) 14 m/s²

How much time does it take for a bird flying at a speed of 45 kilometers per hour to travel a distance of 1,800 kilometers?
a) 30 km/h
b) 35 km/h
c) 40 km/h
d) 45 km/h

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