(a) Explanation Given info: The car can accelerate from rest to u in T s . The power P is ratio of the work done w and time t , P = w t (1) According to work energy theorem, the total work done in the form of change in kinetic energy is, w = 1 2 m v f 2 − 1 2 m v i 2 Here, m is the mass of object. u i is the initial speed of the object. u f is the final speed of the object. Substitute 1 2 m u f 2 − 1 2 m u i 2 for w in the equation (1), P = w t = 1 2 m v f 2 − 1 2 m v i 2 t . (2) For rest position to speed u m / sec in T s , Substitute 0 m / sec for v i , u m / sec for v f and T sec for t in equation (2) (b) To determine The velocity of the car at 2 T s after starting.

Physics, Books a la Carte Edition (5th Edition)

5th Edition

ISBN: 9780134020853

Author: James S. Walker

Publisher: PEARSON

See similar textbooks

Concept explainers

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.

Question

Chapter 7, Problem 54PCE

(a)

To determine

The time taken for the car to accelerate from u to 2u.

(b)

To determine

The velocity of the car at 2T s after starting.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 7, Problem 53PCE

Chapter 7, Problem 57GP

Students have asked these similar questions

A small postage stamp is placed in front of a concave mirror (radius = 1.1 m), such that the image distance equals the object distance. (a) What is the object distance? (b) What is the magnification of the mirror (with the proper sign)?

Calculate the anti-clockwise torque and the clockwise torque of the system with the ruler and the washers. Record these values in Data Table 5. Ruler = 11.56 g, small washer = 1.85 g, large washer = 24.30 g. Calculate the % Difference in the Torques and record the values in Data Table 5. Is ΣAnticlockwise torque and Anticlockwise torque the same thing, are they solved in the same way?

A window washer stands on a uniform plank of mass M = 142 kg and length l = 2.80 m supported by 2 ropes attached at the ends of the plank. The window washer has a mass m = 68.0 kg. What is the tension in each of the ropes, T1 and T2, if the window washer's displacement from the center of mass of the plank is x = 0.930 m as shown in Figure 1: Window Washer Problem?

Chapter 7 Solutions

Physics, Books a la Carte Edition (5th Edition)

Ch. 7.1 - Enhance Your Understanding (Answers given at the...Ch. 7.2 - Enhance Your Understanding (Answers given at the...Ch. 7.3 - As an object moves along the positive x axis the...Ch. 7.4 - Enhance Your Understanding (Answers given at the...Ch. 7 - Is it possible to do work on an object that...Ch. 7 - A friend makes the statement, Only the total force...Ch. 7 - A friend makes the statement, A force that is...Ch. 7 - The net work done on a certain object is zero What...Ch. 7 - Give an example of a frictional force doing...Ch. 7 - A ski boat moves with constant velocity Is the net...

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

The time taken for the car to accelerate from u to 2 u .

Solution Summary: The author explains how the car can accelerate from rest to u in Tmathrm

Concept explainers

The time taken for the car to accelerate from u to 2u.

The velocity of the car at 2T s after starting.

Want to see the full answer?

Chapter 7 Solutions