Answer:
1.25
Step-by-step explanation:
To find the time it will take a motor to lift a load to a given height, we need to use the formula for power.
The formula for power is given by:
P = W/t
where P is the power of the motor, W is the work done by the motor, and t is the time it takes for the motor to do the work.
In this case, we are given that the power of the motor is 200 Watts, the weight of the load is 80 kg, and the height to which the load is lifted is 2 meters. We can use these values to solve for the time it takes for the motor to lift the load.
First, we need to calculate the work done by the motor. The work done by the motor is equal to the weight of the load multiplied by the height to which the load is lifted:
W = F * d
W = 80 * 2
W = 160
Next, we can use the formula for power to solve for the time it takes for the motor to lift the load:
P = W/t
200 = 160/t
t = 1.25
Therefore, it will take the motor 1.25 seconds to lift the 80 kg load to a height of 2 meters.