Question

A car has a mass of 820 kg. It starts from rest and travels 41 m in 3.0 s. What is the net force applied to the car?

Answer 1

First, we need to calculate the acceleration of the car using the formula:

acceleration = (final velocity - initial velocity) / time

Since the car starts from rest, the initial velocity is 0 m/s. The final velocity can be calculated using the formula:

final velocity = (distance traveled) / time

final velocity = 41 m / 3.0 s
final velocity = 13.67 m/s

Now we can calculate the acceleration:

acceleration = (13.67 m/s - 0 m/s) / 3.0 s
acceleration = 4.56 m/s^2

Next, we can calculate the net force applied to the car using Newton's second law:

force = mass x acceleration
force = 820 kg x 4.56 m/s^2
force = 3741.6 N

Therefore, the net force applied to the car is 3741.6 N.