| ⇦ | 
| ⇨ |
The motion of a particle along a straight line is described by equation : x= 8 + 12t– t³ where x is in metre and t in second. The retardation of the particle when its velocity becomes zero, is :
Options
(a) 24 ms⁻²
(b) zero
(c) 6ms⁻²
(d) 12 ms⁻²
Correct Answer:
12 ms⁻²
Explanation:
x = 8 + 12t – t³ The final velocity of the particle will be zero, because it retarded.
V= 0 + 12 – 3t² = 0 ⇒ 3t² = 12 ⇒ t = 2 sec
Now the retardation a = dv/ dt = 0 – 6t
a [ t= 2] = – 12 m/s²
retardation = 12 m/s²
Related Questions: - The unit of thermal conductivity is
- Find the fundamental frequency of a closed pipe if the length of air column is 42m.
- A transistor is operated in common emitter configuration at constant collector
- The wavelength of first line of Balmer series is 6563Å. The wavelength of first line
- The radius of curvature of the convex face of a plano-convex lens is 12 cm
Topics: Motion in Straight Line
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The unit of thermal conductivity is
- Find the fundamental frequency of a closed pipe if the length of air column is 42m.
- A transistor is operated in common emitter configuration at constant collector
- The wavelength of first line of Balmer series is 6563Å. The wavelength of first line
- The radius of curvature of the convex face of a plano-convex lens is 12 cm
Topics: Motion in Straight Line (93)
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