Navigate

The angular velocity of a wheel increases from 100 rps to 300 rps in 10 seconds.

The angular velocity of a wheel increases from 100 rps to 300 rps in 10 seconds. The number of revolutions made during that time is

Options

(a) 600
(b) 1500
(c) 1000
(d) 2000

Correct Answer:

2000

Explanation:

Assuming constant angular acceleration,
α=2πx300-2πx100/10
=2πx200/10
=40 π radius/s²
ω²f-ω²i=2α.θ
θ=4π²(90000-10000)/2×2πx20
=2π(80000)/40
=2πx2000
.·. Total number of revolutions=2000.

KL2008
admin:

View Comments (1)

  • Average rate = (100+300)/2 = 200 rotation per second
    In 10 second rotation = 200×10=2000

Leave a Comment

Related Questions

  1. A thin film of soap solution (n=1.4) lies on the top of a glass plate (n=1.5).
  2. The earth radiates in the infrared region of the spectrum. The spectrum is correctly
  3. In an LCR circuit, capacitance is changed from C to 2C. For the resonant frequency
  4. The escape velocity of a body on an imaginary planet which is thrice the radius
  5. If the radioactive dacay constant of radium is 1.07 x 10⁻⁴ year⁻¹, then its half-life