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Unit II Review for Multiple Choice Part of the Test
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The gravitational force between two objects depends on their ___________________________ and _________________________.
Gravitational force increases when _______________________increases and decreases when ______________________increases.
What is the type of friction when objects go through a liquid or gas? __________________________________________________.
As a rocket takes off, the _________________ force is the gas coming out of the rocket.
The speed determined by a radar gun is called ____________________________________________________________________.
In the Balloon Propulsion lab, the forces slowing down the balloon projectile were _______________________________________
__________________________________________________________________________________________________________.
The type of friction that exists for a fish swimming through water is __________________________ ________________________.
Give an example of a non-contact force? ________________________________________________________________________
Marissa and her family travel from Slidell, Louisiana to Memphis, Tennessee. When Marissa divides the total distance they
traveled by the total time they were traveling, she is calculating their _______________________ ______________________.
The expression “per” as in miles per hour or meters per second means ____________________________________________
Speed that does not change is called _______________________________ ____________________________.
The rate at which velocity changes is called _____________________________________________.
The acceleration due to gravity is ________________________________________ on Earth.
The SI unit of force preferred by scientists is the _______________________________.
On a vector drawing, Alexi decides to use a scale of 1.0 cm = 2.0 N. The force represented by an arrow 3.5 cm long would be ____.
How would your weight and mass on Earth compare to your weight and mass if you were on the Moon?
My weight would be ________________________ and mass would be _________________________ on the moon.
The force that resists the motion of an object sliding across a surface is called ______________________ ________________.
The friction force that resists the motion between two surfaces that are not moving is called ___________________________.
When the forces on an object are balanced, we say that the object is in ____________________________________________.
Is the object at rest? Explain. ______________________________________________________________________________
Newton’s first law of motion is also known as the Law of ________________________________.
A ball is rolling down a level sidewalk. As it rolls along, it slows down and stops. Why? ______________________________
______________________________________________________________________________________________________.
Cheung pushes on a toy car, and it accelerates at 0.22 meters per second per minute. Carlos pushes on the same toy car with
twice as much force as Cheung. Compare the acceleration when Carlos pushes the car to when Cheung pushes the car.
______________________________________________________________________________________________________
Explain: “Every action force creates a reaction force that is equal in strength and opposite in direction.”
_____________________________________________________________________________________________________
If an action force is a swimmer pushing his arms through the water, what is the corresponding reaction force? _____________
_____________________________________________________________________________________________________
Does an object at rest have inertia? Explain. __________________________________________________________________
A cart is rolling down a special ramp where there is no friction at all. What will happen if the amount of mass on the cart is increased?
_____________________________________________________________________________________________________
A book rests on a table. The force of gravity pulls down on the book with a force of 20 Newtons. What prevents the book from
accelerating downward at 9.8 m/s2? ________________________________________________________________________
An object that is free-falling but no longer is accelerating had reached its _________________________ _________________
Energy is measured in units of ________________________.
Exercise may transform the chemical energy in the food you eat into what other form of energy?
A stretched spring is what type of energy? __________________________________________________________________
How are speed and velocity similar? _______________________________________________________________________
How are they different? _________________________________________________________________________________
Weight is a ______________ that depends on an object’s ____________ and the ___________________ of the planet it is on.
The kinetic energy of an object will increase the most if you increase the _________________________________________.
Gravitational potential energy is energy due to the object’s ___________________________ and _______________________.
Give a form type of radiant (electromagnetic) energy. __________________________________________________________
When energy in a system is transformed, what happens to the total amount of energy in the system?______________________
What happens to the energy stored in oil when it is used to heat a house? ___________________________________________
What energy transformation takes place when the brakes on an automobile become hot when they are used continuously?
______________________________________________________________________________________________________
When a ball is thrown into the air, the potential energy gained must come from its kinetic energy. As the ball gains potential
energy, its speed will ____________________________________________________.
A gallon of gasoline contains chemical energy. If you pour a gallon of gasoline into your car, you could drive for about 20
miles on the highway (about 20 minutes). You could choose instead to run a lawn mower for an hour with one gallon of
gasoline. If the gasoline were to come in contact with a fire, the entire gallon would burn in less than a minute. Which reaction
has the most power? ____________________________________________________________________________________
If two forces are equal and in opposite direction, will an object accelerate? _________Can the object be moving? Explain.
______________________________________________________________________________________________________
A very strong force is applied to a desk in order to move it. However, it does not move. Was any work done? Explain.