1.
A force of 20 N displaces a body by 5 m in the direction of force. What is the work done?
A
4 J
B
25 J
C
100 J
D
50 J
View Answer
Correct Answer: C — 100 J
Explanation:
Work = Force × Displacement = 20 × 5 = 100 J.
Loading practice questions
2 practice sets · Page 1 of 1
A force of 20 N displaces a body by 5 m in the direction of force. What is the work done?
4 J
25 J
100 J
50 J
Correct Answer: C — 100 J
Explanation:
Work = Force × Displacement = 20 × 5 = 100 J.
A body starts from rest and accelerates uniformly at 4 m/s². What is its velocity after 5 seconds?
10 m/s
20 m/s
25 m/s
15 m/s
Correct Answer: B — 20 m/s
Explanation:
Using v = u + at. u = 0, a = 4 m/s², t = 5 s. v = 0 + 4 × 5 = 20 m/s.