Question

1. Which of the following best describes the movement of an object at rest if no outside forces act on it? (1 point)
It will move due to inertia.
Gravity will eventually cause it to move.
It will stay at rest due to inertia.
It will stay at rest due to gravity.

Answer 1

2. A 2,500 kg car moves at 15 m/s2; 15 m/s2 is the ___________ of the car. (1 point)
acceleration
force
velocity
speed

3. Two people are pushing a couch from opposite sides. One person is pushing to the right with a force of 3 N. The other person is pushing to the left with a force of 4 N. Which of the following best describes the movement of the couch? (1 point)

The couch will move to the left with a force of 1 N.
The couch will not move.
The couch will move to the right with a force of 7 N.
The couch will move to the left with a force of 7 N.
5. If a bowling ball hits a wall with a force of 6 N, the wall exerts a force of ____ back on the bowling ball. (1 point)
0 N
3 N
6 N12 N
6. A person roller skates down a street heading east. Which of the following would be true about friction in this scenario? (1 point)
Friction does not affect the skates in this scenario.
Friction pulls the skates’ wheels eastward.
Friction pulls the skates’ wheels downward, toward the center of Earth.
Friction pulls the skates’ wheels westward.
7. Which type of measurement does the following sentence describe?A robin flies east at 15 meters per second. (1 point)
velocity
distance
momentum
freefall
8. As a raindrop falls from a cloud to the surface of Earth, (1 point)
its speed increases due to gravity.
its speed increases due to air resistance.
it moves at a constant speed.
it moves at a constant velocity.
10. Which of the following best describes the motion of a rolling soccer ball during a game? (1 point)
It will not be affected by inertia.
It will have a constant velocity until acted upon by outside forces.
It will not be affected by gravity.
It will have a constant velocity due to outside forces.
11. A 5 kg skateboard moves at 7 m/s2.What is the force of the skateboard? (1 point)
2 m/s2
12
7 m/s
35 N
12. Which of the following does not change when a car keeps a constant speed but changes direction? (1 point)
acceleration
velocity
momentum
mass
13. Which of the following is not a force that would act on a bicycle as it moves down a street? (1 point)gravity
air resistance
inertia
sliding friction
14. Two people are pushing a couch from the same side. One person pushes with a force of 2 N. The other person pushes with a force of 4 N. Which of the following best describes how the couch will move? (1 point)
The couch will move with a force of 8 N.
The couch will move with a force of 2 N.
The couch will not move.
The couch will move with a force of 6 N.
15. A book is sitting on a table. Which of the following is true about the table? (1 point)
It is pushing up on the book.
It exerts no force on the book at all.
It is pulling down on the book.
It can affect the mass of the book.
16. Which of the following is the outside force that causes the planet Jupiter to orbit the sun? (1 point)sliding friction
gravity
air resistance
mass
18. Why does a car slide when it rolls over an icy patch on a road? (1 point)
Cars have more momentum on icy surfaces.
There is less friction between the car tires and the ice than between the car tires and the road.
There is more friction between the car tires and the ice than between the car tires and the road.
Cars have less momentum on icy surfaces.
20. If the net force acting on an object is 0 N, the forces are (1 point)
balanced.
unbalanced.
not present.
a result of friction.
21. If you swung a bucket of water quickly in an upside down circular path, the water would not fall out of the bucket. Which of the following best describes why this happens? (1 point)
Due to centripetal force, the water is pushing on the bottom of the bucket.
Air resistance pushes on the water and keeps it from falling out.
Gravity does not act on objects moving in a circular path.
The collisions between the water and the sides of the bucket keep the water from falling out.
22. An object has more momentum if it has which of the following? (1 point)
a large mass and low velocity
a high velocity and small mass
a high velocity and large mass
a low velocity and small mass
23. A scientist from the United States conducts an experiment using miles per hour to measure speed. Why might this be confusing for scientists in other countries? (1 point)
Scientists in other countries don’t usually perform experiments involving speed.
Scientists in other countries express speed as mass times acceleration.
Scientists in other countries use SI units when measuring speed.
Scientists in other countries do not use SI units when measuring speed.

Answer 2

my answers are :

1. It will stay at rest due to inertia.
2. acceleration
3. The couch will move to the left with a force of 1 N.
5. 6 N
6. Friction pulls the skates' wheels westward.
7. velocity
8. its speed increases due to gravity
10. It will have a constant velocity until acted upon by outside forces.
11. 35 N
12. mass
13. sliding friction
14. The couch will move with a force of 6 N.
15. It is pushing up on the book.
16. gravity
18. There is less friction between the car tires and the ice than between the car tires and the road.
20. balanced.
21. Due to centripetal force, the water is pushing on the bottom of the bucket.
22. a high velocity and a large mass
23. Scientists in other countries use SI units when measuring speed

Answer 3

Are these the right answers?

Answer 4

Yes, these are all correct answers.

Answer 5

Now if only people would put the essay questions and people would answer them.

Answer 6

People like you deserve a medal because I sure as heck wasnt look back through 20+ lessons to find the answers LOL