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A 93300 kg train travels North with a constant speed of 7.78 m/s for 5 hours. The train's brakes are applied and exert 4500 N of force for a period of time to reduce the train's speed to 3.39 m/s. How much time were the brakes applied for, to slow the train down?

A 93300 kg train travels North with a constant speed of 7.78 m/s for 5 hours. The train's brakes are applied and exert 4500 N of force for a period of time to reduce the train's speed to 3.39 m/s. How much time were the brakes applied for, to slow the train down?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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I need help with number 2 please and round all numbers to three significant digits 

01c. (d) If the wall and puck are in contact for o.0608 S, how much force is applied to the puck? 02. A 93300 kg train travels North with a constant speed of 7.78 m/s for 5 hours. The train's brakes are applied and exert 4500 N of force for a period of time to reduce the train's speed to 3.39 m/s. How much time were the brakes applied for, to slow the train down? 03. A 0.722 kg ball moving 5.36 m/s rightwards collides into a stationary ball, with a mass of 1.08 kg. After the collision, the 0.722 kg ball is moving 3.05 m/s still rightwards. Calculate the velocity of the other ball after the collision. 04. A 0.317-ka ball traveling at 7.42 m/s west collides Save
Transcribed Image Text:01c. (d) If the wall and puck are in contact for o.0608 S, how much force is applied to the puck? 02. A 93300 kg train travels North with a constant speed of 7.78 m/s for 5 hours. The train's brakes are applied and exert 4500 N of force for a period of time to reduce the train's speed to 3.39 m/s. How much time were the brakes applied for, to slow the train down? 03. A 0.722 kg ball moving 5.36 m/s rightwards collides into a stationary ball, with a mass of 1.08 kg. After the collision, the 0.722 kg ball is moving 3.05 m/s still rightwards. Calculate the velocity of the other ball after the collision. 04. A 0.317-ka ball traveling at 7.42 m/s west collides Save
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