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WorksheetsPES Unit 3/4 Quizizz
Total questions: 40
Worksheet time: 25mins
An object in motion tends to stay in motion and an object at rest tends to stay at rest until acted on by an unbalanced force is which of Newton's laws?
1st
2nd
3rd
4th
The acceleration of an object is dependent upon the net force acting upon the object and the mass of the object is which of Newton's laws?
1st
2nd
3rd
4th
For every action there is an equal and opposite reaction is which of Newton's laws?
1st
2nd
3rd
4th
What is defined a push or pull?
force
net force
an unbalanced force
a balanced force
What is the term for when two forces are acting in opposite directions on an object and are equal in size and the object stays still
net force
balanced force
accelerated force
unbalanced force
Forces that cause a change in motion of an object are called
balanced forces
net forces
motion forces
unbalanced forces
Calculate the net force
20
10
0
30
Calculate the net force
25
65
20
15
If you are pushing a 1200 kg car with an acceleration of 0.5 m/s2 , what is the force you have applied to the car?
600
2400
4.16
60
If you INCREASE the force applied to a 50 kg crate, what happens to the ACCELERATION of the crate
acceleration increases
acceleration decreases
force increases
this cannot be determined
the sum of all forces acting on an object is called the
net force
balanced force
motion force
accelerated force
What can be said of friction?
it works against you as you are trying to move an object
it works with you as you are trying to move an object
it lifts up an object as you are trying to move it
it is never noticeable as you try to move an object
Based on Newton's 2nd Law of Motion, which statement is true about the force of the wagon with the kids if the mass of kids is identical but wagon A is moving TWICE the speed because it has more people pushing than that of wagon B
wagon A will have a greater force
wagon B will have a greater force
the force will be the same for both wagons
the force will be zero for both wagons
An object is falling downward through Earth's atmosphere. In which direction is the air resistance force?
Down
Up
Around the object
Through the object
The upward force which is exerted against a falling object is
gravity
terminal velocity
air resistance
intertia
A force which causes objects to fall is
weight
gravity
air resistance
absorbency
If you jump out of an airplane, which two forces are acting on you?
Gravity and friction
Force and gravity
Gravity and Air Resistance
When you drop a hammer and a feather on the moon what will happen? There is no air on the moon.
They will hit at the same time
The hammer will hit first
The feather will hit first
The sum of kinetic and potential energy is called...
sum energy
nonmechanical energy
mechanical energy
space energy
Which form of energy is involved in a pencil falling from a desk?
kinetic
nonmechanical
gravitational potential
elastic potential
Energy stored due to the interactions between objects
potential
positional
total
kinetic
What is the rate at which energy is converted?
potential energy
kinetic energy
mechanical energy
power
The ability to do work is called
energy
force
power
machine
A device that changes the force or increases the motion from work is a
computer
engineer
automobile
machine
All are examples of a simple machine EXCEPT
a lever
a pulley
motor
wheel and axle
A moving van burns gasoline in its engine. During this process it converts
chemical energy to mechanical energy
kinetic energy to potential energy
thermal energy into electrical energy
mechanical energy into kinetic energy
What is the unit of report for energy?
Joules
meters
newtons
grams
The equation for force is
W= fd
W= fN
W=mv
W=wh
What is needed to calculate work?
time and distance
speed and distance
force and direction
acceleration and velocity
Is this an example of work?
Yes
No
500 J of work is done by a person who uses a force of 50N to move a box, how far does it go?
10 m
0.1 m
25,000 m
10 J
Newtons are the unit for _____________.
Work
Distance
Acceleration
Force
Power is measured in ___________.
meters
joules
newtons
watts
A cheetah can run briefly with a speed of 31.0 m/s. Suppose a cheetah with a mass of 47.0 kg runs at this speed. What is the cheetah’s kinetic energy?
1457 Joules
22,584 Joules
15 Joules
45,167Joules
Potential energy is stored energy. Objects that are higher up have more potential energy than objects that are lower (if both objects have the same mass). If two objects have different masses, the more massive objects has more potential energy (if they are are at the same height).
I don't get it.
GOT IT!
What two factors affect an object's potential energy?
area and volume
area and height
mass and height
mass and velocity
At which point does the ball has the greatest gravitational potential energy (GPE)?
A
G
D
C
G
Which would have the LEAST gravitational potential energy (GPE)?
A ball sitting on the ground
Moon viewed from the Earth
An airplane flying 30,000 feet above the ground
A rock sitting on top of Mt. Everest
How could you increase the gravitational potential energy of an object without changing its mass and gravity?
Make the object larger
Lower the object towards the ground
Raise the object farther off the ground
Allow the object to roll on the ground
