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UNIT 1
UNIT 1
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1
Describe the Net force:
Unbalanced 2 N right
Unbalanced 2 N left
Balanced 0 N
Balanced 22 N right
2
What is the unit of mass in Physics?
joules
kilograms
newtons
liters
3
What is net force?
unbalanced forces
1/2 of the total forces acting on an object
The total amount of force on an object
balanced forces
4
Which has more kinetic energy
50 g toy car moving at 20m/sec
50g toy car moving 10m/sec
5
The definition of Joules is
Unit for work
A push or pull
Unit for power
Speed x time
6
Acceleration in Physics is ________
The rate at whic distance changes
Always constant
The rate at which velocity changes
Always zero
7
If less force is applied, an object will move ____________.
Faster
At a steady speed
Slower
Higher
8
PHYSICS: select the correct example of Friction in action!!
A ball rolling to a stop
Feeling exhausted after precomps
A ball falling in a black hole
A ball accelerating
9
Where would a rollercoaster have the least kinetic energy?
Halfway down a tall hill
At the top of the tallest hill
At the bottom of the tallest hill
In the loops
10
What is a force in PHYSICS?
An object that is being moved
The motion of an object in response to gravity
has a magnitude but no direction
A push or pull on an object in a given direction
11
Newtons first law states
If A exerts a force on B then B in turn exerts a force on A.
A bodies motion remains unless acted on by a net force
Force is proportional to acceleration if mass is constant
12
Potential Energy (Definition)
The energy that is stored in an object
The energy of John Cena
The energy of movement
The energy of energy
13
What is the definition of velocity?
Change in speed or direction
Distance divided by time
How fast you traveled over time
Speed and Direction
14
How does air resistance affect the acceleration of falling objects?
helps them accelerate
makes them lighter
speeds them up
slows them down
15
What is Mass? (Physics)
amount of matter in a body
a large group of people together
force of gravity on an object
region in which a mass experience a force due to gravity
16
How can you increase the potential energy of a bow an arrow?
Knock the Arrow
Fire It
Pull it Back
17
In physics, force equals...
mass times acceleration
force times distance
mass divided by volume
mass times velocity
18
At what point does the skateboarder have the most potential energy?
3
2
1
19
Energy physics definition??
Ability to do work, which is the ability to exert a force causing a change
Action and reaction
Ability to rest, which is the ability to exert a force causing displacement
The resistance of an object to a change in its position
20
Describe the Net force.
Unbalanced 15 N right
Balanced 0 N
Unbalanced 185 N right
Unbalanced 15 N left
21
Law of Conservation of Energy
states that energy cannot be created
states that energy is made and destroyed
states that energy cannot be destroyed
states that energy cannot be created or destroyed
22
Sir Isaac Newton is the founder of Physics
False
True
23
Sir Isaac Newton established ____ laws of motion.
Critical
Three
Four
Fun
24
What is the net force?
85 N to the right
85 N to the left
35 N to the right
0 N
25
Which point has the LEAST kinetic energy?
A
C
A and C
B
26
Fill in the Blank: Potential energy is referred to as ___________ energy.
Kinetic
Stored
Mechanical
Motion
27
The more inertia an object has, the more mass it has
false
true
28
Law of Conservation of Energy
Energy cannot be created or destroyed, it can be transferred.
Energy can be created & destroyed, but it can't be transferred.
29
How do you INCREASE kinetic energy?
move slower
decrease mass
move higher
move faster
30
Describe the Net force
Balanced 0 N
Unbalanced 80 N right
Balanced 80 N right
Unbalanced 180 N left
31
Sir Isaac Newton discovered force and motion
True
False
32
The greater the force applied to an object, the _____________ acceleration
lesser
greater
33
magnitude of a force is
how big the force actually is
depends on center of gravity
where the force is coming from
where the force meets the structure
34
Which ball has more potential energy?
Green
Blue
35
An object will move at the same velocity, which means at the same _____ and in the same______
speed and direction
time and place
distance and space
velocity and acceleration
36
Define magnitude of a force.
size of a force
direction of a force
whether a force is positive or negative
object on which a force acts
37
What happens to Kinetic Energy as Potential Energy is decreased?
Increases
It stays the same
Decreases
38
When should you subtract net forces?
When there is no motion.
When the forces are moving in the same direction.
When the forces are moving in opposite directions.
When there is a balanced force.
39
In physics, acceleration includes...
slowing down
changing direction
speeding up
all are types of acceleration
40
PHYSICS: match the definition: FRICTION
the force you feel on your face when cycling
the force produced by water pushing upwards on an object
the force that prevents or slows down movement
this force allows some insects to move on the water surface
41
Which of the following contains kinetic energy?
A pen sitting on the edge of a table
A soccer ball right before the kick
A car driving 3 miles per hour
A boulder sitting on the top of a mountain
42
What is air resistance?
the force that holds everything in the universe together
The measure of the amount of matter in an object
What is air resistance?
a frictional force exerted on a moving object
43
What is the direction and net force?
Left 3N
Right 3N
Right 10N
Left 3N
44
Newton's Second Law of Motion says:
F=MA
S=D/T
A=FM
T=D/S
45
The tendency of an object to resist a change in its state of motion is called the object's ______.
mass
friction
incline
inertia
46
Which point has the MOST kinetic energy?
B
C
A
A and C
47
In physics, what is work?
The force required to make a moving object stop
The effort required over a certain distance
The effort exerted over a certain amount of time
The force required to make an object accelerate
48
Why does point C have the most potential energy?
It has the most mass
It's traveling the fastest
It is the highest off the ground
49
Kinetic energy definition
energy of heat
the energy of motion, or energy in use
energy of metals
the energy of a parked car
50
Fill in the Blank: Kinetic energy is defined as energy in ____________.
Stored
Motion
Florida
Physics
51
If the same force is applied to an object with a large mass, it will have a _____ acceleration.
smaller
larger
