QUESTIONS:
What is the difference between speed and velocity?
ANSWERS:
Speed is the distance traveled over time.
Velocity is the distance traveled over time in a
particular direction.
So the difference between speed and velocity is
“direction”.
What is the speed of an object in a particular
direction called?
velocity
QUESTIONS:
Force equals…..(what is the equation?)
ANSWERS:
Force equals mass times acceleration.
or Mass = Force divided by acceleration.
or Acceleration = Force divided by mass.
An object that is in motion will always have what
kind of force acting on it?
An unbalanced force.
QUESTIONS:
Acceleration is a change in velocity divided by…
ANSWERS:
Time
A force that always acts opposite of the direction
of motion is called…
Friction
QUESTIONS:
If net force is equal to zero and there is no movement,
then the forces are…
ANSWERS:
Balanced.
What is the combination of all forces acting on an
object?
Net Force
QUESTIONS:
The SI unit for force is the...
ANSWERS:
Newton.
Friction of motion is called…
Kinetic Friction
Friction of something with no motion is called…
Static Friction
QUESTIONS:
Newton’s First Law of Motion states that ….
ANSWERS:
An object at rest tends to stay at rest and an object in
motion tends to stay in motion.
Another name for Newton’s First Law is…
The Law of Inertia
QUESTIONS:
Newton’s Second Law of Motion states that…
ANSWERS:
The acceleration of an object depends on the mass of
an object and the force that is applied to it.
The formula for Newton’s Second Law is…
F=ma (Force = mass times acceleration)
QUESTIONS:
Newton’s Third Law of Motion states that…
ANSWERS:
For every action there is an equal and opposite
reaction.
According to Newton’s Third Law of Motion,
forces always come in...
Pairs (or in twos)
QUESTIONS:
Mass is the amount of matter in a…
ANSWERS:
given amount of space.
Weight is the measure of the force of ____________
on an object.
gravity
QUESTIONS:
What is the force of the beach ball if the mass is
.30 kg and it is accelerating at 20 m/s2?
ANSWERS:
F= ma
So the F = .30kg x 20m/s2
F= 6N
What is the net force and direction of the box
below?
7 N towards the right.
20 N
13 N