Share Gravity, normal forces and applied forces
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Gravity is best described as a force that…
only acts on moving objects
pulls objects toward Earth
pushes objects away from Earth
A book resting on a table remains still because…
no forces act on the book
gravity is stronger than normal force
normal force equals gravity
Which situation shows only balanced forces?
A person pushing a moving cart
A ball rolling down a hill
A book lying on a table
The normal force always acts…
only downward
parallel to motion
perpendicular to the surface
When you stand on the ground..the normal force acts…
horizontally
downward into the ground
upward from the ground
If gravity suddenly disappeared..objects would…
float away
fall faster
stay still on surfaces
A force diagram represents forces using…
circles showing speed
arrows showing direction and size
lines showing motion only
If two forces are equal and opposite..the object will…
accelerate forward
accelerate backward
remain at rest or move at constant speed
Which is an example of an applied force?
Pushing a door open
Earth pulling an object
A book resting on a table
A person pulls a rope. This is…
an applied force
gravity
a normal force
The size of an arrow in a force diagram represents…
direction only
type of object
magnitude of force
Gravity acts on…
only heavy objects
all objects with mass
only objects on Earth
When a ball is thrown upward
downward the entire time
only at the top
only when falling
gravity acts…
A box is pushed but does not move. This means…
gravity disappeared
forces are balanced
applied force is zero
Which force prevents you from sinking into the ground?
Applied force
Friction only
Normal force
A larger arrow in a force diagram means…
no force
greater force
less force
