ENGINEERING ANALYSIS

CALCULATION

To calculate the operating time of the lawnmower based on the assumed battery capacity, we need to consider several factors:

Battery Capacity: Let's assume the battery capacity is 10V, 21Ah (ampere-hours) and 210Wh (watt-hours).

System Power: We need to know how much power the overall system consumes (motor, controller, etc.). Let's assume the average power consumption is 150W.

Battery Discharge Rate: To calculate how long the battery will last, we need to consider the rate of power usage and power loss during operation.

Let's use the formula:

Operating Time = (Battery Capacity, Wh/System Power) ×Power Usage Rate

If we assume an average power usage rate of 70%, then we can calculate the operating time as follows:

Operating Time = (210 Wh/150 W) ×0.70 = 1 hours

So, assuming a battery capacity of 10V, 21Ah, 210Wh and an average power of 150W with a 70% power usage rate, the lawnmower can operate for approximately 1 hours or 60 minutes before the battery needs to be recharged.