Question

In first gear, or low gear, an automobile's engine runs about three times as fast as the drive shaft. In second gear, the

Answer 1

Engine is currently in first gear as mentioned in question

• Speed=2100rpm

Drive shaft speed be x

• 3x=2100
• x=700rpm

Answer 2

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