Final answer:
The force needed to stop a car can be calculated using the equation Force = mass x acceleration. In this case, the car has a mass of 1000 kg and is moving at 10 m/s. The correct answer is 1,000 N (d).
Step-by-step explanation:
To find the force needed to stop a car, we can use the equation:
Force = mass x acceleration
Acceleration can be found using the equation:
acceleration = (final velocity - initial velocity) / time
Given that the car has a mass of 1000 kg and is moving at 10 m/s, if it comes to a stop, its final velocity will be 0. Let's assume it takes a certain amount of time for the car to stop completely. Plugging in the values, we get:
acceleration = (0 - 10) / time
Now we can rearrange the equation to solve for time:
time = -10 / acceleration
Once we have the value of time, we can plug it back into the equation for acceleration and find the force needed to stop the car. Therefore, the correct answer is 1,000 N (d).