| ⇦ | 
| ⇨ |
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 ball rolls without slipping. The raidus of gyration of the ball about an axis
- Rate of photoelectric emission is proportional to
- A particle of mass 1mg has the same wavelength as an electron moving with a velocity
- The dimensional formula for Boltzmann’s constant is
- A bullet of mass 0.05 kg moving with a speed of 80 m/s enters a wooden
Topics: Work Energy and Power
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A ball rolls without slipping. The raidus of gyration of the ball about an axis
- Rate of photoelectric emission is proportional to
- A particle of mass 1mg has the same wavelength as an electron moving with a velocity
- The dimensional formula for Boltzmann’s constant is
- A bullet of mass 0.05 kg moving with a speed of 80 m/s enters a wooden
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