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WorksheetsForces, Frame of Reference, and Friction
Total questions: 65
Worksheet time: 37mins
The location of an object in relation to a nearby object or place is called . . .
reference point
motion
position
frame of reference
A change in position is called . . .
position
frame of reference
reference point
motion
A push or pull on matter from all directions is called . . .
speed
velocity
acceleration
force
Forces that cause a change in motion are . . .
gravity
friction
balanced forces
unbalanced forces
Forces on an object that are equal in size & opposite direction, cancelling each other out, are called . . .
unbalanced forces
balanced force
friction
gravity
A force that opposes motion; can act between two objects that are touching, or between air & a moving object . . .
gravity
friction
balanced forces
unbalanced forces
Which type of friction is shown in the picture?
rolling
fluid
static
sliding
A force that opposes motion between any surfaces that are in contact.
gravity
acceleration
friction
direction
Which type of friction is shown in the picture?
fluid
static
rolling
sliding
Fluid friction happens with objects moving through ______________ or ___________________.
gases or liquids
solids or liquids
gases or solids
What type of force can be exerted over distance?
contact
noncontact
neither
both
For which type of force is part of the definition that the force decreases in strength as the objects get farther apart?
contact
noncontact
neither
both
Select all the statements that are true about this picture.
The forces are balanced and moving the cart forward
The forces are unbalanced and the cart is moving forward
The forces are adding together and equal 17 N
The forces are subtracting and equal 17 N
Forces can be a _____ or a ______.
(a)
Are the forces balanced or unbalanced on the soccer ball?
balanced
unbalanced
If there was no friction on earth why would you starve to death?
you would not be able to pick up food
you would never be hungry
plants would not be able to grow
rain would never fall
If there was no friction which would be true about meteors?
They would burn up in the atmosphere and never hit the Earth.
They would not slow down or burn up in the atmosphere, so would hit the Earth more often and at high speed and cause major destruction.
They would float away in to space and never enter the Earth's atmosphere.
They would enter the Earth's atmsphere and not slow down and go so fast they would explode in huge fire ball.s
Are the forces balanced or unbalanced in this situation? A rock rolling down the side of a mountain?
balanced
unbalanced
Are the forces balanced or unbalanced? A book resting on a table?
balanced
unbalanced
Are the forces balanced or unbalanced? A car accelerating to get on the freeway?
balanced
unbalanced
Which takes more effort force? Getting a wood block to start moving from a rest postion or to keep the block moving once it is in motion?
Getting a wood block to start moving from a rest postion
keep the block moving once it is in motion
What type of force is gravity?
A noncontact pulling force
A contact pulling force
A noncontact pushing force
a contact pushing force
If there was no friction on Earth why would there be no buildings?
Static friction is what keeps nails and screws in place
sliding friction is what keeps builidings in place
fluid friction is what keeps concrete and lumber from falling down
there would be no gravity
What is the coefficient of friction?
how much force a material has
how much weight a material creates
how dense a material is
how unbalanced a material is
how much friction a material can create
Materials that have a low coefficient of friction would be
very rough and create lots of friction
very rough and create little friction
very smooth and create lots of friction
very smooth and create little friction
What is compression?
A contact force where materials are pulled apart
A noncontact force where materials are pushed together
a contact force where materials pushed together
a noncontact force where materials pulled apart
An example of the force of tension is
a sponge being squeezed
your foot pushing off the ground
the hover craft demonstration from the lab
a rubber band being stretched
the air leaving the CD hovercraft in the lab demonstration was a demonstration of what type of force?
tension
reaction force
gravity
compression
Why does a book move a shorter distance when pushed on a rug compared to the same book being pushed on a countertop or marbles?
the effort force was lost used up due to more friction
the effort force was lower due to more friction
the surface area was larger
the effort force was less and so the book could not move as far
What type of friction is on this boat?
statice
sliding
rolling
fluid
What type of friction helps the child?
static
sliding
rolling
fluid
What type of friction does the man have to overcome to get the box moving>
static
sliding
rolling
fluid
What is the net force?
1N to the right
7 N to right
1 N to the left
7 N to the East
Why would a parachute not work if there was no friction on Earth?
there would be no gravity
there would be no static friction
there would be no fluid friction
there would be no sliding friction
Are the forces on the race cars balanced or unbalanced
balanced
unbalanced
Because the skier is going faster as he goes down the hill this implies the forces are
balanced
unbalanced
At the start of the unit what told us the forces on the toy truck were balanced?
the truck was on the counter
the truck was not moving
the truck rolled backwards
the truck came to a stop when it reached the clothespins
Ice skates slide because they make
a layer of water between the skates and the ice
a layer of ice between the skates and the ice
the metal freezes
they cut into the ice
If you are on a skateboard, tossing a ball up and down, that does the motion of the ball look like to. you, the skateboarder?
a parabolic curve
up and down
side to side
looks like the ball is not moving.
According toi Bill Nye what is one reason fish have this body shape?
to reduce fluid friction
to make it harder to pick them up
to make them more buoyant
to make them hard for prey to see
You are conducting an experiment. You place a wood block on a ramp and it does not move. Which material, if added to the ramp might cause the block to move?
wax paper
graph paper
sandpaper
Why did it take more effort force to overcome static friction that to keep the woods block sliding?
Static friction had more surface area
static friction is when forces are balanced so you must unbalance the forces before the object will move
static friction contains more gravity
static friction is a stonger internal force
The object was pushed in the same direction it was already moving with a small force.
The object was pushed in the opposite direction with an equal and opposite force
the object was pushed in the opposite direction with a force greater than its forward force.
the object was pushed in the same direction it was already moving with a large force
Gravity is a contact force
Gravity in a noncontact force
Gravity is a form of friction
G
The object has been pushed with an equal and opposite force
The object has been pushed with a larger force in the same direction.
The object has been pushed with a larger force in the opposite direction.
The object has not had a force applied to it.
This is normal force
This is magentic force
This is applied force
This is electrostaic force
The parachute slows down due to fluid friction
The parachute slows down due to sliding friction
The parachute slows down due to rolling friction.
These electrostatic forces are
contact and pushing
noncontact and pushing
contact and pulling
noncontact and pulling
