# Magnetic Field and Instructor Explanation

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Magnetic Field and Instructor Explanation

There are 2 pages in this exam:
Page:
1 2

1.
Question:
(TCO 4) A body moving with an acceleration having a constant non-zero magnitude must experience a change in: Your Answer:

Speed

acceleration

velocity

CORRECT

weight

Instructor Explanation:
Remediation: Knight, Chapter 1.6 Points Received:
6 of 6
2.
Question:
(TCO 4) A ball is dropped from a 250 foot building. How long before the ball hits the ground? Your Answer:

2.025 sec

3.95 sec

CORRECT

4.62 sec

15.62 sec

Instructor Explanation:
Remediation: Knight, Chapter 2.5 Points Received:
6 of 6
3.
Question:
(TCO 4) A bullet is fired vertically upward with an initial velocity of 250 m/sec. How high does it go? Your Answer:

250 m

798 m

2791 m

3190 m

CORRECT

Instructor Explanation:
Remediation: Knight, Chapter 2.5 Points Received:
6 of 6
4.
Question:
(TCO 4) Suppose that while walking in a straight line at a uniform speed, you throw a ball straight up about 2 or 3 m without breaking stride. Where will it land? Your Answer:

Behind you

In front of you

CORRECT

To the right of you

Instructor Explanation:
Remediation: Knight, Chapter 4.3 Points Received:
6 of 6
5.
Question:
(TCO 4) An industrial robot has a “forearm” that is 50 cm long and weighs 50 N. What torque, supplied by the motor in the elbow joint, is required to hold the forearm horizontal? Your Answer:

0 N-m

5 N-m

12.5 N-m

CORRECT

25 N-m

Instructor Explanation:
Remediation: Knight, Chapter 12.5 Points Received:
6 of 6
6.
Question:
(TCO 4) A 120-kg box is on the verge of slipping down an inclined plane with static coefficient of friction 0.90. What is the angle of inclination of the

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