Did you know?
Absolute zero (ā273.15°C) is the coldest possible temperature ā at which atoms nearly stop moving.
Did you know?
Absolute zero (ā273.15°C) is the coldest possible temperature ā at which atoms nearly stop moving.
An electric lift with a maximum load of kg (lift + passengers) is moving up with a constant speed of m/s. The frictional force opposing the motion is N. The minimum power delivered by the motor to the lift in watts is: ( m/s)
To solve this problem, we need to calculate the minimum power delivered by the motor to the lift.Given:⢠Maximum load (lift + passengers) kg⢠Constant speed m/s⢠Frictional force opposing the motion N⢠Gravitational acceleration m/sFirst, calculate the gravitational force acting on the lift: NThe total force that the motor needs to overcome is the sum of the gravitational force and the frictional force: NThe power delivered by the motor is given by the product of the total force and the velocity: WTherefore, the minimum power delivered by the motor to the lift is watts.This corresponds to Option 3.
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