⇦ | ⇨ |
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: - A current of 5 A is passing through a metallic wire of cross-sectional area 4×10⁻⁶ m².
- The wavelength of X-rays is in the range
- In a circuit, the current lags behind the voltage by a phase difference of π/2.
- Van der waals,equation of state is(p+a/v²)(V-b)=nRT. The dimensions of a and b
- To demonstrate the phenomenon of interference, we require two sources which emit
Topics: Motion in Straight Line
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A current of 5 A is passing through a metallic wire of cross-sectional area 4×10⁻⁶ m².
- The wavelength of X-rays is in the range
- In a circuit, the current lags behind the voltage by a phase difference of π/2.
- Van der waals,equation of state is(p+a/v²)(V-b)=nRT. The dimensions of a and b
- To demonstrate the phenomenon of interference, we require two sources which emit
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