A 1.50 x 103-kg car starts from rest and accelerates uniformly to 16.9 m/s in 11.6 s. Assume that air resistance remains constant at 400 N during this time. (a) Find the average power developed by the engine. hp (b) Find the instantaneous power output of the engine at t = 11.6 s, just before the car stops accelerating. hp Need Help? Read It

A 1.50 x 103-kg car starts from rest and accelerates uniformly to 16.9 m/s in 11.6 s. Assume that air resistance remains constant at 400 N during this time. (a) Find the average power developed by the engine. hp (b) Find the instantaneous power output of the engine at t = 11.6 s, just before the car stops accelerating. hp Need Help? Read It

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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A 1.50 × 103-kg car starts from rest and accelerates uniformly to 16.9 m/s in 11.6 s. Assume that air resistance remains constant at 400 N during this time. (a) Find the average power developed by the engine. hp 29.7 (b) Find the instantaneous power output of the engine at t = 11.6 s, just before the car stops accelerating. 0.079670122 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. hp Need Help? Read It
9) A person in good physical condition can put out 100 W of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time, answer the following. (a) How many people would it take to run a 3.00 kW electric clothes dryer? _____ people (b) How many people would it take to replace a large electric power plant that generates 800 MW? _____people
3) When its 75.0kW engine is generating full power, a small single-engine airplane with mass 750kg gains altitude at a rate of 2.50m/s. What fraction of the engine power is being used to make the airplane climb? (The remainder is used to overcome the effects of air resistance and of inefficiencies in the propeller and engine.) Express your answer as a percentage.
A 699-kg elevator starts from rest and moves upward for 2.60 s with constant acceleration until it reaches its cruising speed, 1.83 m/s. (a) What is the average power of the elevator motor during this period? hp (b) How does this amount of power compare with its power during an upward trip with constant speed? (Give the power during an upward trip with constant speed.) hp Need Help? Read It
HI, please see attached image for question. Thank you
A 1.50 ✕ 103-kg car starts from rest and accelerates uniformly to 16.2 m/s in 11.1 s. Assume that air resistance remains constant at 400 N during this time. (a) Find the average power developed by the engine. hp(b) Find the instantaneous power output of the engine at t = 11.1 s, just before the car stops accelerating. hp