Font size
WorksheetsEnergy in Collisions
Total questions: 20
Worksheet time: 19mins
A (a) is any push or pull action that will cause an object to start moving or change directions.
Which of the examples below is explains contact forces?
A compass needle swinging to point North because of the Earth's magnetic force is an example of contact forces.
Pushing a cart is an example of energy transfer.
Chewing gum is an example of contact forces .
Jumping rope is an example of contact forces.
Which two choices below are units of force? Pick TWO choices from below.
Meter (M)
Newton (N)
Inches (IN)
Pound (LB)
Is the statement TRUE and FALSE?
Forces occurring without objects touching is called noncontact forces.
True
False
A force can
cause an object to start moving or change direction.
can cause an object to stop moving.
can cause an object to stay still.
l.
What is gravity ?
a contact force that acts over a distance and pulls objects towards each other.
is the wind that makes things move.
a non contact force that acts over a distance and pulls objects towards each other.
What TWO FACTORS does the pull of gravity between two objects depend on ? Pick TWO.
The amount of time it takes the objects to move.
The amount of space an object has.
The amount of matter in the objects.
The distance between the objects.
TRUE OR FALSE: Gravity is stronger when objects are closer together.
True
False
TRUE OR FALSE: The moon is more massive than the Earth.
True
False
WHAT WORD BELONGS IN THE STATEMENT?: The pull of gravity between Earth and the Moon causes ________________.
waves
tides
storms
Why is jogging on a rough sidewalk easier than jogging on an icy sidewalk?
What is friction?
Friction is the push and pull of an object.
Friction is the mass an object has.
Friction is a force that opposes the motion of one object moving past another.
Explain three ways friction is NOT helpful.
What does friction depend on?
Friction depends on the mass of the two objects and how slow the objects are pushed together.
Friction depends on the energies of the two objects and how close the objects are pushed together.
Friction depends on the forces of the two objects and how hard the objects are pushed together.
Friction depends on the surfaces of the two objects and how hard the objects are pushed together.
CHOSE THE WORD THAT COMPLETES THE STATEMENT:
________ surfaces usually have less friction than rough surfaces.
Bumpy
Icy
Smooth
According to the text, what produces heat?
Energy between two surfaces produces heat.
Friction between two surfaces produces heat.
Mass between two surfaces produces heat.
TRUE OR FALSE:
Energy does not always keep its form. It also does not always stay in one place.
True
False
WHICH WORD BELONGS IN THE BLANK?
Energy is ______________ when it changes from one form to another.
transferred
transformed
released
stored
WHICH WORD BELONGS IN THE BLANK?
Energy is ______________ when it passes from one object to another.
transferred
transformed
released
stored
What is the law of conservation of energy?
The idea that energy can be created or destroyed. It cannot only change form.
The idea that energy can be created or destroyed and cannot change form.
The idea that energy cannot be created or destroyed. It can only change form.
