EXAMPLE Given: A sports car has a mass of 2 Mg and an engine efficiency of ɛ = 0.65. Moving forward, the wind creates a drag resistance on the car of F, = 1.2v2 N, where v is the velocity in m/s. The car accelerates at 5 m/s?, starting from rest. Find: The engine's input power when t = 4 s. Plan: 1) Draw a free body diagram of the car. 2) Apply the equation of motion and kinematic equations to find the car's velocity at t = 4 s. 3) Determine the power required for this motion. 4) Use the engine's efficiency to determine input power.

EXAMPLE Given: A sports car has a mass of 2 Mg and an engine efficiency of ɛ = 0.65. Moving forward, the wind creates a drag resistance on the car of F, = 1.2v2 N, where v is the velocity in m/s. The car accelerates at 5 m/s?, starting from rest. Find: The engine's input power when t = 4 s. Plan: 1) Draw a free body diagram of the car. 2) Apply the equation of motion and kinematic equations to find the car's velocity at t = 4 s. 3) Determine the power required for this motion. 4) Use the engine's efficiency to determine input power.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

OO O0I 94) 8:50
EXAMPLE
Given: A sports car has a mass of 2 Mg and an engine efficiency
of ɛ = 0.65. Moving forward, the wind creates a drag
resistance on the car of F, = 1.2v2 N, where v is the
velocity in m/s. The car accelerates at 5 m/s?, starting from
rest.
Find: The engine's input power when t = 4 s.
Plan: 1) Draw a free body diagram of the car.
2) Apply the equation of motion and kinematic
equations to find the car's velocity at t = 4 s.
3) Determine the power required for this motion.
4) Use the engine's efficiency to determine input
power.
nashat N
•..

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