Physical Science

Chapter 3: Forces

Self-Check Quiz.-Eng.

1.
What happens to the gravitational force as objects get farther apart?
A)It decreases.
B)It increases.
C)It stays the same.
D)It fluctuates.
2.
You exert a gravitational force on __________.
A)everything
B)nothing
C)only objects near you
D)only objects on Earth
3.
What is the value of acceleration due to gravity?
A)98 m/s2
B)9.8 m/s2
C)9.8 m/s
D)9.8 m x s2
4.
How does weight relate to mass?
A)Weight is the same as mass.
B)Weight is mass times acceleration due to gravity.
C)Weight is mass divided by acceleration due to gravity.
D)They are unrelated.
5.
How much does a 10-kg block weigh?
A)98 pounds
B)9.8 N
C)9.8 pounds
D)98 N
6.
What happens to the weight of astronauts when they are in orbit?
A)They become weightless.
B)It remains the same.
C)They gain weight.
D)They lose weight.
7.
What causes thrown objects to travel in a curved path?
A)gravity
B)Earth's gravitational pull and the inertia of the object
C)air resistance
D)momentum
8.
What happens to the acceleration due to gravity of an object in projectile motion?
A)It increases.
B)It decreases.
C)It fluctuates.
D)It stays the same.
9.
What causes acceleration to change in an object traveling in a circular path?
A)force changes
B)direction changes
C)speed changes
D)momentum changes
10.
In which direction is the centripetal force?
A)toward the edges of the circle
B)along the curve
C)upward
D)toward the center of the circle
11.
What is not an example of a satellite?
A)the Earth
B)the Moon
C)the Sun
D)the Mir space station
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