| ⇦ | 
| ⇨ |
A body of mass 3 kg acted upon by a constant force is displaced by S meter, given by relation S=1/3t², where t is in second. Work done by the force in2 seconds
Options
(a) 8/3 J
(b) 19/5 J
(c) 5/19 J
(d) 3/8 J
Correct Answer:
8/3 J
Explanation:
S = (1/3) t²; v = dS / dt = (2/3) t
a = d²S / dt² = 2/3
F = ma = 3 × (2/3) = 2N
Work = 2 × (1/3) t²
At t = 2 seconds
.·. Work = 2 × (1/3) × 2 × 2 = (8/3) J
Related Questions: - If emf induced in a coil is 2 V by changing the current in it from 8 A to 6 A
- Which one of the following statements is true, if half-life of a radioactive substance
- An electron in potentiometer experiences a force 2.4×10⁻¹⁹N. The length of potentiometer
- If two electric bulbs have 40 W and 60 W ratings at 220 V, then the ratio
- A 0.5 kg ball moving with a speed of 12 m/s strikes a hard wall at an angle
Topics: Work Energy and Power
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If emf induced in a coil is 2 V by changing the current in it from 8 A to 6 A
- Which one of the following statements is true, if half-life of a radioactive substance
- An electron in potentiometer experiences a force 2.4×10⁻¹⁹N. The length of potentiometer
- If two electric bulbs have 40 W and 60 W ratings at 220 V, then the ratio
- A 0.5 kg ball moving with a speed of 12 m/s strikes a hard wall at an angle
Topics: Work Energy and Power (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply