Question

A car of mass 1200 kg decelerates to a stop at 30 m/s squared. What was the braking force needed to stop the car?

A) 36,000 N
B) 30,000 N
C) 25,000 N
D) 15,000 N

Answer 1

The braking force needed to stop a car of mass 1200 kg decelerating at 30 m/s² is calculated using Newton's second law of motion, and the answer is 36,000 N.

Step-by-step explanation:

To determine the braking force needed to stop a car of mass 1200 kg decelerating at 30 m/s², we apply Newton's second law of motion, which states that force equals mass times acceleration (F = ma). By multiplying the car's mass (1200 kg) by the deceleration (30 m/s²), we get:

F = 1200 kg × 30 m/s² = 36,000 N.

Therefore, the braking force needed to stop the car is 36,000 N, which corresponds to option A).