PLEASE SELECT THE CORRECT ANSWER
1
The vertical acceleration of a projectile
Choose one answer.
a. equals g pointing sometimes upwards and other times downwards |
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b. continuously increases |
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c. equals g pointing downwards |
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d. equals g pointing upwards |
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e. is zero |
Question 2
The horizontal acceleration of a projectile
Choose one answer.
a. stays constant |
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b. sometimes decreases and sometimes increases |
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c. continuously increases |
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d. is zero |
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e. continuously decreases |
Question 3
When an object reaches its terminal speed, its acceleration is zero.
Answer: True False ?
Question 4
The horizontal speed of a projectile
Choose one answer.
b. continuously decreases |
c. is zero |
d. continuously increases |
e. sometimes decreases and sometimes increases |
Question 5
The vertical speed of a projectile
Choose one answer.
a. is zero |
c. stays constant |
d. sometimes decreases and sometimes increases |
Question 6
All forces have specific directions associated with them.
Answer: True False?
Question 7
If object A has more mass than object B,
Choose one answer.
a. A will weigh more than B. |
b. A will be harder to keep moving in a circle. |
c. A will be harder to accelerate than B. |
d. all of the above |
Question 8
The force that keeps your feet from sliding as you walk is
Choose one answer.
a. centripetal force |
b. kinetic friction |
c. static friction |
d. weight |
Question 9
Two forces of 4 N and 12 N act on a body simultaneously. The net force on the body is
Choose one answer.
a. 4 N |
b. 12 N |
c. impossible to tell from the given information |
d. 8 N |
e. 16 N |
Question 10
As an object moves faster through the air, its terminal speed increases
Answer: True False?
Question 11
If the net force on an object is zero,
Choose one answer.
a. the object’s acceleration must be zero |
b. the object must be at rest |
c. there must be no forces acting on the object |
d. there can be no friction acting on the object |
Question 12
You are presently exerting a gravitational force on the earth.
Answer: True False ?
Question 13
“Net force” means the vector sum of all the individual forces acting on a particular body.
Answer: True False?
Question 14
An example of an action at a distance force is
Choose one answer.
a. static friction |
b. weight |
c. tension |
d. kinetic friction |
e. none of the above |
Question 15
Which is larger, a newton or a pound?
Choose one answer.
a. a pound |
b. This question is nonsense—they don’t measure the same physical quantity. |
c. a newton |
d. They are the same size. |