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GKE: Gravity
Test Description: A review of gravity and acceleration.
Instructions: Answer all questions to get your test result.
1) As the mass of an object decreases, the gravitational pull
A
decreases
B
increases
C
stays the same
2) As distance between two objects decreases, the gravitational pull
A
decreases
B
stays the same
C
increases
3) What is the constant rate of acceleration due to gravity?
A
32.8 m/s2
B
5.8 m/s2
C
9.8 m/s
D
9.8 m/s2
4) In daily life, all objects always fall at the same speed
A
True
B
False
5) What do we call the force that pulls objects toward each other?
A
mass
B
acceleration
C
gravity
D
energy
6) Why don't all objects fall at the same rate?
A
Because of air resistance.
B
Objects do fall at the same rate.
C
Because gravity constantly changes.
7) What two factors affect the gravitational attraction between objects?
A
Mass and distance
B
Mass and acceleration
C
Speed and distance
D
Weight and energy
8) Which pair of objects has the largest gravitational force?
A
marble and car
B
There is no gravitational force between any of these pairs of objects.
C
car and bowling ball
D
marble and baseball
9) 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
The gravitational force between the two objects is weak because they are 1 m apart.
B
The gravitational force between the two objects is weak because their masses are small.
C
No gravitational force exists between the two objects because they are not touching.
D
No gravitational force exists between the two objects because their masses are small.
10) 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 B.
C
The weight of an object is three times larger on Planet A.
D
The weight of an object will depend on more factors than just the weight and size of the planet.
11) If Steve throws the football 45 meters in 3 seconds, what is the average speed of the football?
A
48 m/s
B
15 m/s
C
135 m/s
D
0.067 m/s
12) 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
300 seconds
B
152 seconds
C
75 seconds
D
0.013 seconds
13) 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
208 seconds
B
1600 seconds
C
0.04 seconds
D
25 seconds
14) 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
Slow down
B
Speed up
C
Change direction
D
All of these
15) Which of the following can change an object’s acceleration?
A
The car with the larger mass will have less inertia than the car with the smaller 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 smaller mass will require less force to stop than the car with the larger mass.
16) 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
9 s
B
12 s
C
5 s
D
7 s
17) What is the final speed of a vehicle that comes to a stop in 5 seconds?
A
5 m/s
B
10 m/s
C
15 m/s
D
0 m/s
18) A baseball is thrown a distance of 60 meters. What is its speed if it takes 0.5 seconds to cover the distance?
A
145 m/s
B
120 m/s
C
140 m/s
D
135 m/s
19) 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
12 m/s²
B
8 m/s²
C
10 m/s²
D
14 m/s²
20) 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
35 km/h
B
30 km/h
C
45 km/h
D
40 km/h
*select an answer for all questions
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