Transcript Newton`s Laws Test Review

NEWTON’S LAWS TEST
REVIEW

Which of Newton’s Laws states for every action
there is an equal and opposite reaction?
3

Which of Newton’s laws states that an object in
motion will remain in motion unless acted upon by
unbalanced forces?
1

The amount of gravitational force between 2
objects depends on which two factors?
 Mass
of objects
 Distance between objects

1 Pound = ? Newtons
 4.448
N

What is the weight of a 250 kg person?
 250x9.8

= 2450 N
What unbalanced force is needed to give a 1000
Kg truck an acceleration of 3 m/s2?
 3000
N

A .50 Kg metal ball experiences a net force of 2
Newtons as it rolls down a ramp. What is the
acceleration of the ball?
4

What is the units for acceleration?
 m/s2

Any object that is thrown or shot through the air is
called a
 Projectile

How do you find an object’s momentum?
 Mass
x velocity

What is the momentum of a 100 kg man running at
a speed of 5 m/s (include correct units)?
 500

kg x m/s
What is the velocity of a 100 kg man with a
momentum of 400 kg x m/s (include correct units)?
4
m/s

How does the total momentum of 2 objects before a
collision compare to the total momentum after a
collision?
 Same

due to Law of Conservation of Momentum
An object that has balanced forces acting upon it
would have a Net FORCE equal to
 zero

When air resistance balances the weight of a
falling object, the object reaches its top speed
called
 Terminal

velocity
The resistance of an object to changing its motion is
called
 inertia

The amount of matter in an object is called its
 Mass

A vector quantity includes both
 Magnitude
and Direction

The value of acceleration for objects in free fall
near earth is __________ (include correct units)
 9.8

m/s2
In the Newton Car lab the rubber bands applied an
action force to the small block of wood, what was
the reaction force?
 Block
of wood on Newton car

If forces occur in pairs and are equal and opposite
why do they not cancel each other out?
 They

are acting on different objects
What is the net force on the box below?
 -40
N
 -25
N
15 N