| ⇦ | 
| ⇨ |
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: - A series L-C-R circuit contains inductance 5 mH, capacitance 2 μF and resistance
- Consider two nuclei of the same radioactive nuclide. One of the nuclei was created
- In a circuit, 5% of total current passes through a galvanometer. If resistance
- A car moving with a speed of 50 kmh⁻¹ can be stopped by brakes after at least 6 m
- At what distance from the centre of earth, the value of acceleration due to gravity
Topics: Work Energy and Power
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A series L-C-R circuit contains inductance 5 mH, capacitance 2 μF and resistance
- Consider two nuclei of the same radioactive nuclide. One of the nuclei was created
- In a circuit, 5% of total current passes through a galvanometer. If resistance
- A car moving with a speed of 50 kmh⁻¹ can be stopped by brakes after at least 6 m
- At what distance from the centre of earth, the value of acceleration due to gravity
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