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Which formula represents the correct relationship between the following parameters?
P: power
T: torque
n: RPM
GS: ground speed
TAS: true air speed
  • A
    P = T × GS
  • B
    P = T / (2 × π × n × 60)
  • C
    P = T x (2 × π × n / 60)
  • D
    P = T × TAS

Work is the result of a force acting over some distance. Work is quantified in joules (Nm) or foot-pounds.

Torque is a rotating force produced by a motor’s crankshaft. The more torque the motor produces, the greater is its ability to perform work.

Power is the measure of how much Work can be done in a specified time. Power is quantified in watts (J/s) or horse power.

POWER AND TORQUE OF A BODY IN ANGULAR MOTION

The power of a rotating body can be expressed as

P = T x ω
= T x 2 x π x nRPS
= T x π x nRPM / 30

where,
P = power (W)
T = torque or moment (Nm)
ω = angular velocity (rad/s)
π = 3.14...
nRPS = rotations per second (rps, 1/s)
nRPM = rotations per minute (rpm, 1/min)

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