Question

The piston in a petrol engine goes up and down $3000$ times per minute. For this engine, calculate the period of the piston.

• A. $0.02s$
• B. $0.04s$
• C. $0.05s$
• D. $0.08s$

Answer 1

Answer: (A)

$0.02s$

The number of complete oscillations per unit time is called frequency.

The time taken by the wave for one complete oscillation is called the time period,

Given,

Number of oscillations $=3000$

Time for $3000$ oscillations, $t=1min=60s$

Frequency, $f=\frac{Numberofoscillations}{time}$

Frequency, $f=\frac{3000}{60}$

$f=50Hz$

Time period, $T=\frac{1}{f}$

$T=\frac{1}{50}$

$T=0.02s$