FREE SIFT Mechanical Comprehension Questions and Answers

Question 1

Christian takes thirty steps forward, followed by thirty steps backward. In terms of his total distance, how many steps has Christian taken?

Accepted Answer

60

Answer

35

Answer

40

Answer

30

Question 2

Danny, a young man from the Northern Hemisphere, is positioned on a scale. Danny is 20 kg heavy. In Newtons, the scale readout is shown. What is Danny's readout?

Accepted Answer

196

Answer

190

Answer

194

Answer

198

Question 3

An inclined plane's strength increases as its

Accepted Answer

Mechanical Advantage

Answer

Output

Answer

Power

Answer

None of the Above

Question 4

The mechanical advantage of a lever with 250 N of resistance and 50 N of effort is

Accepted Answer

5

Answer

0.2

Answer

0.5

Answer

1

Question 5

2 m are raised by a 50 N vase. What work is completed?

Accepted Answer

100J

Answer

25J

Answer

2J

Answer

50

Question 6

The sliding coefficient of friction for a brick is 0.28. The book must be forced to slide at a constant speed with a force of 5.5 N. What is the brick's mass?

Accepted Answer

2.0 kg

Answer

2.8 kg

Answer

1 kg

Answer

5.5 kg

Question 7

A basic machine always has

Accepted Answer

<100% efficiency

Answer

50% efficiency

Answer

200% efficiency

Answer

100% efficiency

Christian takes thirty steps forward, followed by thirty steps backward.In terms of his total distance, how many steps has Christian taken?

Christian takes thirty steps forward, followed by thirty steps backward.
In terms of his total distance, how many steps has Christian taken?