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Roller Coasters, Gravity and Friction Quiz
Con il contributo di: Raiten
A force of attraction between objects due to their
masses and the distances between them is _______
air resistance
Kinetic energy
Friction
Gravity
A type of friction with air
molecules as an object falls is ___________
speed
mass
air resistance 
gravity
The hammer and the feather stayed where they were.
6.11b
In 1971, the Apollo 15 spacecraft landed on the moon. During this mission,
astronaut David Scott wanted to see what would happen if he dropped a hammer
and a feather from the same height while standing on the moon’s surface. He
performed the experiment, dropping both objects at the same time. What happened?

The hammer hit the ground as the feather 
floated away

The hammer and the feather hit the ground 

at the same time.

The hammer hit the ground first and then the 

feather hit.

Objects with greater masses have
a ______________ force of attraction 
decreased
less
Greater
equal
Your roller coaster had the greatest Kinetic
energy _____________________
near the bottom of the highest hill
halfway down the hill
at the end of all the hills
at the top of the highest hill
_____________ is a measure
of gravitational pull
friction
weight
air resistance
potential energy
6.8a
Which statement best describes the energy changes that occur while
 a child is riding on
a sled down a steep, snow-covered hill?

A. Kinetic energy decreases and potential energy increases.

B. Kinetic energy increases and potential energy decreases.

C. Both potential energy and kinetic energy decrease.

D. Both potential energy and kinetic energy increase.


A
B
C
D
6.8aA cart at the top of a hill is released and rolls down the hill. Which of the followingdescribes the energy of the cart just as it reaches the bottom of the hill?
A. The cart has no energy.
B. The cart has maximum kinetic energy.
C. The cart has maximum gravitational potential energy.
D. The cart has equal gravitational potential and kinetic energy.

A
B
C
D
6.8c
An escalator at a shopping mall is 40 m long and moves at a constant 
speed of 2 m/s. If
a student steps onto the escalator at the bottom 
while it is moving, how long will it take
him to travel the 40 m?

A. 5 s 

B. 10 s 

C. 15 s 

D. 20 s


A
B
C
D
The force of attraction between two objects
depends on
a Japanese sandwich
the air resistance
their weights
mass and distance
put the paper on top the tennis ball
crumple the paper into a shape like the tennis ball
fold the paper
How might a student get a tennis ball anda piece of paper to hit the ground at the same time when dropped?
A force can be a _______ or a _______.'
A) spin, rotateB) push, pullC) balance point, counterbalanceD) wheel, axle
A
B
C
D
 ________ is a force on earth that is caused by two things rubbing together.

A) motionB) spinningC) frictionD) inertia
A
B
C
D
We know that _______ is what makes an object stay sitting still or keep moving until a force acts upon it.
A) counterweightB) forceC) inertiaD) friction
A
B
C
D
Friction is present whenever surfaces _________
A) break openB) look like simple machinesC) are smoothD) touch
A
B
C
D
Which object has the most potential energy?
A) Mr. Murray falling from an 8ft. ladderB) Mr. Murray falling from the 4ft. deskC) Mr. Murray standing on a 4 ft. deskD) Mr. Murray standing on an 8 ft. ladder
A
B
C
D
Which force slows down a basketball rolling along
 the ground the most?

A) solar energy
B) air resistance
C) friction
D) gravity
A
B
C
D
If my car takes 0.2558 seconds to go
30 centimeters, what is its speed in
cm/second?
0.00852 cm/sec
7.674 cm/sec
none of these
117.28 cm/sec
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