Ch 2, 8th Grade Question Preview (ID: 39796)
Newton's Laws Of Motion.
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Force is measured in
a) joules
b) pounds
c) Newtons
d) meters per second
Objects that are closer together will experience
a) greater gravitational force
b) less gravitational force
c) no difference in gravitational force
d) fluctuations in gravitational force
If an object is in motion, balanced forces will
a) slow it to a stop
b) change its velocity
c) keep it at the same speed and direction
d) none of the above
In order for an object's velocity to change, the forces on it need to be
a) balanced
b) unbalanced
c) equal
d) only gravity and friction
The type of collision in which objects collide and bounce off of each other is called
a) an elastic collision
b) an inelastic collision
c) a fluid collision
d) a glue collision
Your mass changes when you visit the moon.
a) true
b) false
c)
d)
Why does your weight change when you visit another planet?
a) because you lose weight on the journey
b) because the sun's energy is different there
c) because the gravitational pull on that planet is different from Earth's
d) it doesn't; mass changes instead.
Friction can be reduced by
a) pressing down harder on an object
b) using lubricants
c) using a more textured surface
d) all of the above
The type of friction that prevents surfaces from sliding past each other is called
a) static friction
b) sliding friction
c) fluid friction
d) none of the above
The tendency of an object to resist a change in motion
a) force
b) friction
c) noncontact force
d) inertia
A push or a pull
a) force
b) friction
c) inertia
d) gravity
The amount of matter in an object
a) momentum
b) noncontact force
c) force pair
d) mass
Which is an example of noncontact force?
a) friction
b) gravity
c) pulling a wagon
d) all of the above
The force two objects apply on each other
a) balanced forces
b) inertia
c) unbalanced forces
d) force pair
You push a toy car along the floor. If there were no friction between the floor and the car,
a) the car would gradually slow to a stop
b) the car would keep going
c) the car would continuously speed up
d) the car would go through the floor
When all the forces acting on an object combine with a net force of 0
a) balanced forces
b) unbalanced forces
c) contact forces
d) gravity
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