Physics MID TERM
PLEASE SELECT THE CORRECT ANSWER
1
The vertical acceleration of a projectile
Choose one answer.
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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 |
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Question 2
The horizontal acceleration of a projectile
Choose one answer.
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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 |
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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.
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a. stays constant |
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b. continuously decreases |
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c. is zero |
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d. continuously increases |
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e. sometimes decreases and sometimes increases |
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Question 5
The vertical speed of a projectile
Choose one answer.
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a. is zero |
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b. continuously increases |
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c. stays constant |
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d. sometimes decreases and sometimes increases |
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e. continuously decreases |
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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.
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a. A will weigh more than B. |
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b. A will be harder to keep moving in a circle. |
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c. A will be harder to accelerate than B. |
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d. all of the above |
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Question 8
The force that keeps your feet from sliding as you walk is
Choose one answer.
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a. centripetal force |
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b. kinetic friction |
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c. static friction |
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d. weight |
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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.
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a. 4 N |
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b. 12 N |
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c. impossible to tell from the given information |
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d. 8 N |
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e. 16 N |
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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.
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a. the object’s acceleration must be zero |
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b. the object must be at rest |
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c. there must be no forces acting on the object |
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d. there can be no friction acting on the object |
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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.
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a. static friction |
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b. weight |
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c. tension |
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d. kinetic friction |
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e. none of the above |
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Question 15
Which is larger, a newton or a pound?
Choose one answer.
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a. a pound |
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b. This question is nonsense—they don’t measure the same physical quantity. |
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c. a newton |
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d. They are the same size. |
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