Answered: A motorbike engine can develop a power…

A motorbike engine can develop a power of 90000 W in order to keep a constant velocity of 30 m/s. What is the pushing force? A. 3000 N B. 30000 N C. 300000 N D. 300 N E. 30 N

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 29P: A shopper pushes a grocery cart 20.0 m at constant speed on level ground, against a 35.0 N...

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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

solve question 3 pleaseeee

A machine does 2500 J of work in 1 min. What is the power developed by the machine?
A. 21 W B. 42 W C. 150 W D. 2500 W E. 150000 W
A car travels with a constant speed of 15 m/s. The car's engine produces a 4000 N pushing force in order to keep the speed constant. How much power is
developed by the engine?
A. 60 W B. 600 W
C. 6000 W
D. 60000 W E. 60000ow
A motorbike engine can develop a power of 90000 W in order to keep a constant velocity of 30 m/s. What is the pushing force?
A. 3000 N
B. 30000 N
C. 300000 N
D. 300 N
E. 30 N
A block with a mass of m crosses a rough horizontal surface at a constant speed of v. The coefficient of kinetic friction between the block and the surface is
u. How much power must be produced in order to overcome the friction force?
A. mg
B. umg
C. zero
D. ug
E. umgv

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