13. Pour qu'une voiture accélère sur une distance de 112 m en 8,23 s, son moteur doit exercer une force de 4250 N. Calcule la puissance du moteur, en watts et en kilowatts.

Here's how to calculate the power of the engine:<br /><br />1. **Calculate the work done:**<br /><br />Work (W) is equal to force (F) multiplied by distance (d).<br /><br />* W = F * d<br />* W = 4250 N * 112 m<br />* W = 476,000 J (Joules)<br /><br />2. **Calculate the power:**<br /><br />Power (P) is equal to work (W) divided by time (t).<br /><br />* P = W / t<br />* P = 476,000 J / 8.23 s<br />* P = 57,837.18 W (Watts)<br /><br />3. **Convert watts to kilowatts:**<br /><br />One kilowatt (kW) is equal to 1000 watts.<br /><br />* P = 57,837.18 W / 1000 W/kW<br />* P = 57.84 kW (kilowatts)<br /><br />**Therefore, the power of the engine is 57,837.18 watts or 57.84 kilowatts.**<br />