1. Imagine that you pushed a box, applying a force of 60 newtons, over a distance of 4 meters. How much work have you done?
15 joules
56 joules
64 joules
240 joules***
Question 2 (Multiple Choice Worth 2 points)
Which statement best describes the relationship between atoms and nuclear forces?
A. Strong nuclear forces hold the nucleus of an atom together. Weak nuclear forces hold neutrons and electrons together.
B. Weak nuclear forces hold the nucleus of an atom together. Strong nuclear forces are responsible for breaking down atoms.
C. Weak nuclear forces hold small atoms together. Strong nuclear forces hold large atoms together.
Strong nuclear forces hold the nucleus of an atom together.
D. Weak nuclear forces are involved when certain types of atoms break down.***
Question 3 (Multiple Choice Worth 2 points)
Your friend just challenged you to a race. You know in order to beat him, you must run 15 meters within 20 seconds in a northern direction. What does your average velocity need to be to win the race?
.5 meters per second, north
.75 meters per second, north***
1.3 meters per second, north
300 meters per second, north
Question 4 (Essay Worth 4 points)
What is the relationship between work and power?
Question 5 (Multiple Choice Worth 2 points)
When buying a car, you tell the salesman that you want to make sure the car can go from 0 miles per hour to 60 miles per hour in 5 seconds. You are describing the car's
speed.
acceleration.
velocity.
magnitude.
Question 6 (Multiple Choice Worth 2 points)
To determine power, it is necessary to know the
energy required and the time it takes.
amount of work and the distance covered.
amount of work in a given time.
distance and time it takes to do work.
Question 7 (Multiple Choice Worth 2 points)
What type of energy conversion occurs when you place your feet near the fireplace and they become warm?
radiant to thermal
thermal to mechanical
mechanical to chemical
nuclear to thermal
Question 8 (Multiple Choice Worth 2 points)
What is Newton's Third Law of Motion?
For every action there is an equal and opposite reaction.
The greater the mass of an object, the more force is needed to cause the object to accelerate.
An object at rest or in motion will remain at rest or in motion unless acted upon by an unbalanced force.
When balanced forces act on an object, there is no change in the object's position.
Question 9 (Multiple Choice Worth 2 points)
A delivery man is told to go 60 miles per hour north to make his delivery on time. These instructions describe the delivery man's
speed.
velocity.
acceleration.
magnitude.
Question 10 (Multiple Choice Worth 2 points)
Your friend is bragging about his motorcycle. He claims that it can go from a stopped position to 50 miles per hour in three seconds. He is describing the motorcycle's
speed.
acceleration.
velocity.
direction.
Question 11 (Multiple Choice Worth 2 points)
Which statement best describes the relationship between forces?
Magnetic and electrical forces are the most alike because they are both caused by positive and negative charges.
Gravitational and magnetic forces are the most alike because they are both types of charges that occur in nature.
Nuclear and magnetic forces are the most alike because they are both related to mass and weight.
Strong nuclear force is most like electric because they are both related to distance.
Question 12 (Multiple Choice Worth 2 points)
This force involves the attraction between charged particles.
Strong Nuclear
Gravitational
Weak Nuclear
Electromagnetic
Question 13 (Multiple Choice Worth 2 points)
Which of the following has potential but not kinetic energy?
a roller coaster zooming down a hill
a child riding their bike
a bird flying from a tree
a ball sitting on a shelf
Question 14 (Multiple Choice Worth 2 points)
Which is the best example of Newton's Third Law of Motion?
A hockey puck sliding on the ice will keep going until it is hit by another player or hits the wall.
It takes more force to move a large tractor trailer than it does to move a small sports car.
A swimmer who jumps off a raft moves forward through the air, and the raft moves backwards through the water.
You are riding in a car that makes a quick right turn. You immediately slide across the back seat.
Question 15 (Multiple Choice Worth 2 points)
If we increase the force applied to an object, and all other factors remain the same, the amount of work will
decrease.
remain unchanged.
increase.
decrease the increase.
Question 16 (Multiple Choice Worth 2 points)
When the sun warms the sidewalk on a hot sunny day, what type of energy conversion occurs?
thermal to mechanical
mechanical to chemical
radiant to nuclear
radiant to thermal
Question 17 (Multiple Choice Worth 2 points)
Which statement describes the relationship between gravitational force and strong nuclear force?
Strong nuclear force is the stronger force; it is related to weight.
Gravity is the weaker force; it is related to mass.
Strong nuclear force is the weaker force; it is related to size.
Gravity is the stronger force; it is not related to weight.
My answers:
1. D
2. D
3. B
4. Work is defined as an ability to do something. Power is the ability to do work. So in order for power to take shape, they must apply work for power to work.
5. B
6. C
7. A
8. A
9. B
10. B
11. D
12. A
13. D
14. B
15. C
16. D
17. B
Are these correct? If not could you tell me which ones are right and which ones are wrong? Thanks
2 answers
0 answers