Download Kahoot PowerPoint With Questions and Answers

Unit 3 Review Questions and
Answers From Kahoot!
Which of the following objects has
more momentum if they are all
moving at the same speed?
A.
B.
C.
D.
Ping pong ball
Balloon
Golf ball
Bowling ball
Answer
D! Because it has more mass
If the formula for momentum is p=mv,
How can you increase the momentum
of a car?
A.
B.
C.
D.
Decrease mass
Increase mass
Decrease speed
All of the above
Answer
B! Increase mass
What is momentum?
A.
B.
C.
D.
Mass x velocity
Mass in motion
Inertia in motion
All of the above
Answer
• D!
What happens when an object at rest
gets hit with an object that has the
same mass?
A. They both go in opposite directions
B. The ball in motion stops and transfers
momentum to the other object
C. They both continue moving in the same
direction
D. Both objects stop
Answer
• B!
Which ball has more potential Energy?
A.
B.
C.
D.
Blue
Green
Same
Neither
Answer
• B
If you wanted to change the potential
energy of an object, what would you
do?
A.
B.
C.
D.
Increase the height
Increase the speed
Increase the gravity
Increase the momentum
Answer
• A
Why are seat belts, air bags, and the
crumple zone so important in car
accidents?
A.
B.
C.
D.
Decreases time, increases force
Decreases time, decreases force
Increases time, decreases force
Increases momentum, increases force
Answer
• C
What variable has the most impact on
Kinetic Energy?
A.
B.
C.
D.
Height
Mass
Gravity
Velocity
Answer
• D
At what point of the roller coaster
does the car have the most potential
energy?
A.
B.
C.
D.
A
B
C
F
Answer
• A
What is energy measured in?
A.
B.
C.
D.
Kg
m/s2
J
m/s
Answer
• C
If the car at position A starts with 25 J
of energy, how much energy will it end
with?
A.
B.
C.
D.
0J
25 J
20 J
12.5 J
Answer
• B
Which law explains the last Kahoot
question?
A.
B.
C.
D.
Law of conservation of momentum
Newton’s 3rd Law
Newton’s 1st Law
Law of conservation of energy
Answer
• D
What is work?
A. Force applied over a distance
B. Homework Ms. Lehman assigned
Answer
• A
Which of the following situations is
work NOT happening?
A.
B.
C.
D.
Lifting a balloon filled with air
Holding a 100 pound object over your head
Pulling a chair across the room
Pushing a snow-filled shovel across the
driveway
Answer
• B
Work = FxD – How much work is being
done if you apply 20N of force over 2
meters?
A.
B.
C.
D.
40J
20J
2J
40N
Answer
• A
What is another way of saying output
force in a pulley system?
A.
B.
C.
D.
Mass
Weight
Distance
Input force
Answer
• B
What is the relationship between the
number of support strings and input
force?
A.
B.
C.
D.
More support strings = more input force
More support strings = less input force
Less support strings = less input force
There is no relationship
Answer
• B
What is the relationship between
input force and distance for a pulley
system?
A.
B.
C.
D.
More force = more distance
Less force = less distance
Less force = more distance
They are the same
Answer
• C
What happens to the work you put
into a pulley system?
A.
B.
C.
D.
The energy is destroyed
The energy is created
Input work is the same as the distance
Input work is converted into potential energy
Answer
• D
What is Kinetic Energy?
A.
B.
C.
D.
Stored energy
Energy of an object’s position
Energy of motion
Destroyed energy
Answer
• C
What would the ratio of KE and PE be
for the roller coaster car at position B?
A.
B.
C.
D.
All PE
All KE
½ PE and ½ KE
1/3 PE and 2/3 KE
Answer
• C