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- 1. Multiple Choice
What is the gravitational force exerted on an object called?
centripetal force
friction
momentum
weight
- 2. Multiple Choice
Which of the following best describes why projectiles move in a curved path?
They have horizontal velocity and vertical acceleration.
They have momentum.
They have mass.
They have weight.
- 3. Multiple Choice
Which of the following explains why astronauts seem weightless in orbit?
Earth's gravity is much less in orbit.
The space shuttle is in free fall.
The gravity of Earth and the Sun cancel.
The centripetal force on the shuttle balances Earth's gravity.
- 4. Multiple Choice
Which of the following exerts the strongest gravitational force on you?
the Moon
Earth
the Sun
this computer
- 5. Multiple Choice
Which of the following is true about an object in free fall
Its acceleration depends on its mass.
it has no inertia.
It pulls on Earth, and Earth pulls on it.
Its momentum is constant.
- 6. Multiple Choice
The acceleration of an object is in the same direction as which of the following?
net force
static friction
air resistance
gravity
- 7. Multiple Choice
Which of the following is NOT a force?
weight
friction
momentum
air resistance
- 8. Multiple Choice
The graph show the speed of a car moving in a straight line. Over which segments are the forces on the car balanced?
A and C
B and D
C and E
D only
- 9. Multiple Choice
The net force on an object moving with constant speed in circular motion is in which direction?
downward
opposite to the object's motion
toward the center of the circle
in the direction of the object's velocity
- 10. Multiple Choice
According to the trend in these data, which of the following values is most likely the speed of the object after falling for 6s?
26.7 m/s
15.1 m/s
20.3 m/s
0 m/s
- 11. Multiple Choice
Over which of the following time intervals is the acceleration of the object the greatest?
0s to 1s
1s to 2s
4s to 5 s
The acceleration is constant
- 12. Multiple Choice
Over which of the following time intervals is the force on the object the smallest?
0s to 1s
1s to 2s
4s to 5s
the force is constant
- 13. Multiple Choice
Which of the following would cause the gravitational force between object A and object B to increase?
Decrease the distance between them.
Increase the distance between them.
Decrease the mass of object A.
Decrease the mass of both objects.
- 14. Multiple Choice
The way in which objects exert forces on each other is described by _____.
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
- 15. Multiple Choice
_____ relates the net force exerted on an object to its mass and acceleration.
Newton's 1st law of motion
Newton's 2nd law of motion
Newton's 3rd law of motion
- 16. Multiple Choice
_____ Prevents surfaces in contact from sliding past each other.
sliding friction
static friction
fiction
weight
- 17. Multiple Choice
The _____ of an object is different on other planets in the solar system
air resistance
mass
weight
pounds
- 18. Multiple Choice
When an object moves in a circular path, the net force is called a(n) _____.
centripetal acceleration
gravity
momentum
Centripetal force
- 19. Multiple Choice
The attractive force between two objects that depends on their masses and the distance between them is _____.
gravity
mass
weight
air resistance
- 20. Multiple Choice
moving or tending to move toward a center...
centripetal force
centrifugal force
Tangent
Curvature
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