Question

What should be the gear ratio of a car when gaining speed on the road ?

• A. less than $1$
• B. equal to 1
• C. greater than $1$
• D. infinite

Answer 1

Answer: (C)

greater than $1$

Suppose a gear assembly is transmitting power and we know that in a gear pair contain two things 1)pinion(smaller diameter/less number or teeth) 2)gear(larger diameter/more number of teeth) hence by mathematical equation we see that the gear ratio is always more than 1.
$\frac{D_1}{D_2}$=$\frac{T_1}{T_2}$
suppose gear contain 23 number of teeth and pinion contain 17 teeth hence there ratio will be written as
$\frac{T_1}{T_2}$=$\frac{23}{17}$=$\frac{1.3}{1}$