## Physics (10th Edition)

The average net force exerted on the car and riders by the magnets is equal to $3.5 \times 10^4N$.
1. Find the acceleration of the car and its riders. $v = v_0 + at$ ** They started at rest, so $v_0 = 0$ $v = at$ $45m/s = a \times (7.0s)$ Divide both sides by 7.0s: $\frac{45m/s}{7.0s} = a$ $a = 6.4 m/s^2$ 2. Calculate the net force exerted on the car and riders: $F=ma$ $F = (5.5\times10^3kg)(6.4m/s^2)$ $F = 3.5 \times 10^4 \frac{kg*m}{s^2} = 3.5 \times 10^4 N$