Answer:
700 rpm
Explanation:
A driveshaft is a shaft that transmits mechanical power.
Its speed is measured in rpm (revolutions per minute).
Engine speed
- First gear: 3 × drive-shaft speed
- Second gear: 1.6 × drive-shaft speed
- Third gear: equal to drive-shaft speed
Given engine speed:
Therefore, the drive-shaft speeds in the different gears are:
First gear
Drive-shaft speed = 2100 ÷ 3 = 700 rpm
Second gear
Drive-shaft speed = 2100 ÷ 1.6 = 1312.5 rpm
Third gear
Drive-shaft speed = 2100 rpm