Final answer:
The average force acting upward on the lift, with a power delivery of 450W at a constant speed of 3 m/s, is calculated to be 150 Newtons using the formula Power = Force x Velocity.F = 450W / 3 (m/s) = 150 N.
Step-by-step explanation:
The student has asked about the average force acting upward on a lift when the motor delivers a power of 450W to move the lift at a constant speed of 3 m/s. To find the average force, we can use the formula for power, which is Power (P) = Force (F) × Velocity (V). Rearranging this formula to solve for force gives us F = P / V. Using the values provided, we can calculate the average force as follows:
F = 450W / 3 (m/s) = 150 N.
Therefore, the average force that acts upward on the lift is 150 Newtons (N).