Question

A train is slowing down from 33 m/s by applying 212N from the brake until it is stopped. The brakes are applied for 23s. What impulse did the brakes apply to the train?

A: 4876 N·s
B: 4876 N
C: 9.3 N·s
D: 9.3 N

Answer 1

To calculate the impulse applied by the brakes to the train, we multiply the force applied (212N) by the time it was applied (23s), resulting in 4876 N·s. So, the correct answer is A: 4876 N·s.

Step-by-step explanation:

The student has asked about calculating the impulse applied to a train when it is slowing down to stop. Impulse can be calculated as the product of the force applied and the time over which it is applied. In this case, the brakes apply a force of 212N for 23 seconds. To find the impulse, we use the formula:

Impulse (J) = Force (F) × Time (t)

Impulse = 212N × 23s = 4876 N·s

Therefore, the correct answer is A: 4876 N·s.