Calculate the watts of power expended when a force of 2.0N moves a book 2.4m in a time interval of 1.0 s.
Express your answer to two significant figures and include the appropriate units.
2*2.4 /1 watts = 4.8 watts
To calculate the watts of power expended, we need to use the formula:
Power (P) = Force (F) × Distance (d) ÷ Time (t)
Given that the force is 2.0N, the distance is 2.4m, and the time interval is 1.0s, we can substitute these values into the formula:
P = 2.0N × 2.4m ÷ 1.0s
P = 4.8 N·m/s
Since watts are the units for power, we need to convert this value from N·m/s to watts. Recall that 1 watt is equal to 1 joule per second (1 W = 1 J/s). Therefore, we can express the answer in two significant figures with the appropriate units:
P = 4.8 W