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WorksheetsIntro to Forces
Total questions: 30
Worksheet time: 35mins
Velocity =
acceleration and velocity
force and strength
speed and direction
the rate at which velocity changes over time.
Magnetic Force:
Is the force of attraction or repulsion generated by rough materials.
Is a force that opposed motion between two objects that are in contact.
Is a force that repulses objects generated by magnetic material.
is a force of attraction or repulsion generated by a magnetic material.
Which forces are considered contact forces?
Air Resistance
Magnetic
Frictional
Gravitational
Which of the following forces are considered non-contact?
Frictional
Air Resistance
Magnetic
Gravitational
The force that naturally pulls objects to the center of earth is called
Electromotive Force
Strong Force
Magnitude
Force of Gravity
A smoother surface will have ______ friction than a rough surface.
More
Less
The same amount
A type of friction that occurs when air pushes against a moving object it to decelerate.
surface area
air resistance
velocity
gravity
Which is the best example of forces acting in the same direction?
a boy lifting his chest off the ground during a pushup
two football players pushing a tackling sled
a person pulling out a garden hose from its reel
two dogs playing tug-of-war with a rope
Polly is pushing a box across the floor with a force of 30 N. The force of gravity is –8 N, and the normal force is 8 N. Which value could describe the force of friction if Polly could not move the box?
–30 N
–8 N
8 N
30 N
Which of these is considered a contact force?
the force between two charged particles
the friction between an object and air
the gravitational pull of a planet
the force between two magnets
A box has two forces acting on it. Once force is 100 N upward. Another force is 50 N downward. What is the net force of the box?
50 N downward
50 N upward
100 N upward
100 N downward
Why are some forces considered to be noncontact forces?
Objects push each other apart to increase the distance between them.
Objects must be large in size in order to exert a force that is strong enough to notice.
Objects do not have to touch each other to experience a force.
Objects must be far apart in order to exert a force.
The diagram shows the forces acting on a box. What is the the vertical net force (up and down)?
50 N up
50 N down
0 N no movement
0 N down
The diagram shows the forces acting on a box. What is the the horizontal net force (left and right)?
50 N right
50 N left
0 N no movement
150 right
Sean is moving heavy furniture by sliding it across the floor. He puts a blanket underneath the furniture. Why did this help him?
The friction is larger between the blanket and the floor than between the furniture and the floor.
The blanket protects the side of the furniture from bumping against the wall.
The friction is smaller between the blanket and the floor than between the furniture and the floor.
The blanket reduces the gravitational force between the furniture and the floor.
Which has a STRONGER force of gravity, the Earth or the Moon?
Earth
Moon
What two things determine the gravity of an object?
mass & weight
mass & distance
density & mass
volume & distance
When will the forces of gravity between two objects be the GREATEST?
when the masses of both objects are small and the objects are far apart
when the masses of both objects are large and the objects are close together
when the masses of both objects are small and the objects are close together
when the masses of both objects are large and the objects are far apart
Which statement about gravity is true?
gravity causes objects to pull towards one another
gravity causes objects to push away from each other
gravity only takes place between planets
the moon doesn't have any gravity
Which model has greater gravitational attraction.
Model A
Model B
Model A and B have the same amount of gravitational attraction.
What keeps the planets in orbit around the sun?
gravity
friction
density
distance
Your weight is the pull of gravity on your body. Suppose you step on a bathroom scale on the Moon. How would your weight on the Moon compare to your weight on Earth?
Greater on the Moon
Less on the Moon
Same on Earth and the Moon
Your mass is the amount of matter, or "stuff", in your body. How would your mass on the Moon compare to your mass on Earth?
Greater on the Moon
Less on the Moon
Same on Earth and the Moon
Which best represents a unit for speed?
Meters
Seconds
Meters/Second
M/s 2
