In first gear, or low gear, an automobile’s engine runs about three times as fast as the drive shaft. In second gear, the
engine does not have to run as fast; usually it runs about 1.6 times faster than the drive shaft. Finally, in third, or high
gear, the engine runs at the same speed as the drive shaft.
Engine speed = 2,100 r.p.m.
Transmission in first gear
Drive-shaft speed:


  1. Answer:
    700 rpm
    Step-by-step 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:
    • 2,100 rpm
    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


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