Chapter 1:
Forces and Pressure
Practice Test
1.
What is a key difference between balanced forces and action-reaction forces?
a.
Action and reaction forces occur in pairs, balanced forces do not.
b.
Newton's Third Law of Motion does not apply to balanced forces.
c.
Balanced forces can result in acceleration, action-reaction forces cannot.
d.
Action-reaction forces act on different objects; balanced forces act on the same object.
Hint
2.
Which force exerts the greatest pressure?
a.
1 N over 10 square meters
b.
10 N over 10 square meters
c.
10 N over 1 square meter
d.
1 N over 1 square meter
Hint
3.
What's is Archimedes' principle?
a.
The volume of water displaced by an object is equal to the volume of the object immersed in water.
b.
The weight of water displaced by an object is equal to the amount of weight lost by an object immersed in water.
c.
The pressure of water on an object increases as the depth increases.
d.
All of the above are correct.
Hint
4.
What is Newton's third law of motion?
a.
An object remains in motion or at rest unless acted on by a force.
b.
The force on an object equals the mass times acceleration.
c.
Every action produces an equal and opposite reaction.
d.
In order for a mass to accelerate, a force must act on it.
Hint
5.
What is the resulting acceleration if 2 N of force are applied to an object at rest with a mass of 4 kg?
a.
4 m/s
2
b.
0.5 m/s
2
c.
8 m/s
2
d.
2 m/s
2
Hint
6.
What is weight?
a.
Weight is acceleration due to gravity times an object's inertia.
b.
Weight is the same as an object's mass in kilograms.
c.
Weight is acceleration due to gravity times an object's velocity.
d.
Weight is acceleration due to gravity times an object's mass.
Hint
7.
What is Newton's second law of motion?
a.
Every action produces an equal and opposite reaction.
b.
An object remains in motion or at rest unless acted on by a force.
c.
The force on an object equals the mass times the acceleration.
d.
The change in velocity equals an object's acceleration.
Hint
8.
What is Newton's first law of motion?
a.
Every action produces an equal and opposite reaction.
b.
The force on an object equals mass times acceleration.
c.
As mass increases, inertia also increases.
d.
An object remains in motion or at rest unless acted on by a force.
Hint
9.
What is a common example of a force?
a.
acceleration
b.
a push or pull
c.
inertia
d.
mass
Hint
10.
How are mass and inertia related?
a.
As an object's mass increases, its inertia increases.
b.
Mass and inertia are not related.
c.
As an object's mass increases, its inertia decreases.
d.
Mass and inertia are the same thing.
Hint
11.
When does an object in a fluid experience buoyancy?
a.
if the object is less dense than the fluid
b.
All objects in a fluid experience buoyancy.
c.
if the object displaces a weight of water equivalent to its own
d.
if the object is denser than the fluid
Hint
12.
What is pressure?
a.
Pressure is how hard you push on an object.
b.
Pressure is acceleration due to gravity times an object's mass.
c.
Pressure is weight or force times each unit of area.
d.
Pressure is the weight acting per unit of area.
Hint
13.
What two forces are acting when objects interact?
a.
gravity and acceleration
b.
gravity and friction
c.
gravity and inertia
d.
friction and acceleration
Hint
14.
How does a swim bladder make it possible for a fish to swim at different depths in the water?
a.
The swim bladder changes the mass of the fish, making the fish sink.
b.
The swim bladder compensates for changes in the pressure of the surrounding water.
c.
gravity and inertia
d.
All of the above are correct.
Hint
15.
What is inertia?
a.
Inertia is the tendency of an object to resist changes in motion.
b.
Inertia is a measure of the lack of motion of an object.
c.
Inertia is a change in the speed of an object or a change in its direction.
d.
Inertia is how fast an object is going in a given direction.
Hint
