×
Get Full Access to Physics: Principles With Applications - 6 Edition - Chapter 7 - Problem 19pe
Get Full Access to Physics: Principles With Applications - 6 Edition - Chapter 7 - Problem 19pe

×

# In Example 7.7, we found that the speed of a roller

ISBN: 9780130606204 3

## Solution for problem 19PE Chapter 7

Physics: Principles with Applications | 6th Edition

• Textbook Solutions
• 2901 Step-by-step solutions solved by professors and subject experts
• Get 24/7 help from StudySoup virtual teaching assistants

Physics: Principles with Applications | 6th Edition

4 5 1 276 Reviews
16
1
Problem 19PE

In Example 7.7, we found that the speed of a roller coaster that had descended 20.0 m was only slightly greater when it had an initial speed of 5.00 m/s than when it started from rest. This implies that ??PE >> KE?i . Confirm this statement by taking the ratio of ??PE to KE?i . (Note that mass cancels.) Example 7.7 Finding the Speed of a Roller Coaster from its Height (a) What is the final speed of the roller coaster shown in ?Figure 7.8 ?if it starts from rest at the top of the 20.0 m hill and work done by frictional forces is negligible? (b) What is its final speed (again assuming negligible friction) if its initial speed is 5.00 m/s?

Step-by-Step Solution:

Step-by-step solution 19PE Step 1 of 3 The expression to find the initial kinetic energy is given below, Here, m is mass and is velocity. The change in potential energy is equal to the product of mass, acceleration due to gravity and height, hence potential energy is,

Step 2 of 3

Step 3 of 3

##### ISBN: 9780130606204

Physics: Principles with Applications was written by and is associated to the ISBN: 9780130606204. This textbook survival guide was created for the textbook: Physics: Principles with Applications, edition: 6. Since the solution to 19PE from 7 chapter was answered, more than 395 students have viewed the full step-by-step answer. The answer to “In Example 7.7, we found that the speed of a roller coaster that had descended 20.0 m was only slightly greater when it had an initial speed of 5.00 m/s than when it started from rest. This implies that ??PE >> KE?i . Confirm this statement by taking the ratio of ??PE to KE?i . (Note that mass cancels.) Example 7.7 Finding the Speed of a Roller Coaster from its Height (a) What is the final speed of the roller coaster shown in ?Figure 7.8 ?if it starts from rest at the top of the 20.0 m hill and work done by frictional forces is negligible? (b) What is its final speed (again assuming negligible friction) if its initial speed is 5.00 m/s?” is broken down into a number of easy to follow steps, and 123 words. This full solution covers the following key subjects: speed, roller, coaster, its, negligible. This expansive textbook survival guide covers 35 chapters, and 3914 solutions. The full step-by-step solution to problem: 19PE from chapter: 7 was answered by , our top Physics solution expert on 03/03/17, 03:53PM.

#### Related chapters

Unlock Textbook Solution