Motion, Forces And Energy Unit Test

37 Questions

Chapters: 1, 2, 5 and 6

• 1.
Match the sentence with the apropriate word.
• A. An object is in motion if it is moving relative to a(n)
• A.
• B. To calculate acceleration, divide the change in ______________ by the time during which the acceleration occurs
• B.
• C. The velocity of an objectgives both its speed and
• C.
• D. You can calculate an average if you know both the total distance and the total time of a trip.
• D.
• 2.
Friction acts in a direction __________ to the direction of an object's motion
• A.

Unrelated

• B.

Opposite

• C.

Equal

• D.

Perpendicular

• 3.
Unless an object at rest is acted upon by a force, it stays at rest due to its
• A.

Matter

• B.

Inertia

• C.

Friction

• D.

Gravity

• 4.
A 10-kg ball is accelerated 500m/s (squared) by a force of...
• A.

5000 N

• B.

50 N

• C.

500 N

• D.

1/50 N

• 5.
A (n) ______________ can cause an objects motion to change
• A.

Unbalanced force

• B.

Balanced force

• C.

Inertia

• D.

Mass

• 6.
The amount of matter in an object is called its
• A.

Weight

• B.

Force

• C.

Inertia

• D.

Mass

• 7.
Newtons second law of motion states the relationship of mass, acceleration and force.  It says that....
• A.

Force equals mass divided by acceleration

• B.

Force equals acceleration divided by mass

• C.

Force equals mass times acceleration

• D.

Every object attracts every other object in the universe

• 8.
A(n) ___________ causes objects to move in a circle
• A.

Centripetal force

• B.

Large weight

• C.

Terminal velocity

• D.

Acceleration

• 9.
Forces can be added together on if they are acting on different objects.
• A.

True

• B.

False

• 10.
According to Newton;s second law of motion, acceleration increases as force increases, if mass stays the same.
• A.

True

• B.

False

• 11.
The force exerted by gravity is stronger if two objects are closer.
• A.

True

• B.

False

• 12.
The force of friction acts between all objects in the universe.
• A.

True

• B.

False

• 13.
A satellite in orbit around Earth is always falling toward Earth.
• A.

True

• B.

False

• 14.
Jake and Tom want to see who is strogest, so they got a rope and decided to play tug-o-war.  Both boys pulled at the rope with all of their strength, but neither of them moved.   This is called unbalanced force.
• A.

True

• B.

False

• 15.
Patty was walking very quickly through the cafeteria with her tray full of food when she tripped over a broomstick and flew forward along with all of her food.   This is an example of Newton's first law of motion which states,  "...an obect in motion will stay in motion..."
• A.

True

• B.

False

• 16.
Potential energy is the energy
• A.

Of velocity

• B.

Of motion

• C.

Of distance

• D.

That is stored

• 17.
Kinetic energy depends on
• A.

Only mass

• B.

Only velocity

• C.

Height

• D.

Mass and velocity

• 18.
Your body converts chemical energy to all of the following EXCEPT
• A.

Nuclear energy

• B.

Thermal energy

• C.

Chemical energy

• D.

Electrical energy

• 19.
A girl throws a ball 15m into the air.  The ball has a maximum potential energy at a height of
• A.

0m

• B.

5m

• C.

10m

• D.

15m

• 20.
An electric blanket converts electrical energy to
• A.

Nuclear energy

• B.

Chemical energy

• C.

Mechanical energy

• D.

Thermal energy

• 21.
The formula, Work/ Time (Work divided by Time) is used to calculate
• A.

Kinetic energy

• B.

Potential energy

• C.

Power

• D.

Mechanical energy

• 22.
Work is the transfer of energy.
• A.

True

• B.

False

• 23.
Potential energy that depends on height is gravitational potential energy.
• A.

True

• B.

False

• 24.
The law of conservation of energy states that when one form of energy is converted to another, SOME energy is destroyed.
• A.

True

• B.

False

• 25.
Power is the rate at which energy is lost.
• A.

True

• B.

False

• 26.
Plants convert electromagnetic energy to chemical energy.
• A.

True

• B.

False

• 27.
The energy stored in fossil fuels is released by burning.
• A.

True

• B.

False

• 28.
A moving object can do work so it has potential energy.
• A.

True

• B.

False

• 29.
Elastic potential energy is associated with objects that can be stretched.
• A.

True

• B.

False

• 30.
A rubber band that is flying across the room is moving because it has kinetic energy.
• A.

True

• B.

False

• 31.
Match the sentence with the apropriate word.
• A. _____________ is the total energy of all of the particles in a substance
• A.
• B. The movement when heated fluid rises and is replaced by a cooler fluid is called a(n) _________________ current.
• B.
• C. The temperature at which a solid changes to a liquid is the ______________.
• C.
• D. A(n) __________________ is a device that transfers thermal energy from a cool region to a warm region.
• D.
• 32.
On the Celcius scale, the number 0 is assigned to the temperatures at which water condenses.
• A.

True

• B.

False

• 33.
The state of a substance depends ont he amound of thermal energy it posesses.
• A.

True

• B.

False

• 34.
Temperature is a measure of the average potential energy of each particle within an object.
• A.

True

• B.

False

• 35.
A rider finishes a 120 km bicycle trip in 3 hours.  The average speed of the rider is....
• A.

360 km/hr

• B.

40 km/hr

• C.

3.6 m/s

• D.

4 m/s

• 36.
An airplane that moves 50 meters in one second has a speed of....
• A.

500 cm/s

• B.

180,000 m/h

• C.

1,800 km/h

• D.

5,000 m/h

• 37.
An object cannot be accelerating if it is changing direction.
• A.

True

• B.

False

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