Question

Find the magnitude of the net force if the mass of the car is 1050 kg, the initial speed is 40.0 km/h, and the stopping distance is 25.0 m.

a) 1680 N
b) 3360 N
c) 5040 N
d) 6720 N

Answer 1

The magnitude of the net force required to stop the car is approximately 1680 N.

Step-by-step explanation:

To find the magnitude of the net force required to stop a car, we can use the equation:

Force = (mass * final velocity2 - mass * initial velocity2) / (2 * stopping distance)

Plugging in the given values, we have:

• mass = 1050 kg
• initial velocity = 40.0 km/h
• stopping distance = 25.0 m

Converting the initial velocity to m/s, we get 11.1 m/s. Plugging in these values into the equation, we find that the magnitude of the net force is approximately 1680 N. Therefore, the correct option is a) 1680 N.