(D) The correct option is $D$.Power is defined as the rate at which work is done or energy is transferred. Mathematically,power $P$ is given by the fo

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Work performed and elapsed time of work

(D) The correct option is $D$.Power is defined as the rate at which work is done or energy is transferred. Mathematically,power $P$ is given by the formula:$P = \frac{W}{t}$where $W$ is the work performed and $t$ is the time interval over which the work is done.Therefore,to determine the power output of an automobile,one must know the total work performed and the time elapsed during that work.

Class 11 Physics Work, Energy, Power and Collision Power

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Which of the following must be known in order to determine the power output of an automobile?

A
Final velocity and height
B
Mass and amount of work performed
C
Force exerted and distance of motion
D
Work performed and elapsed time of work

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Class 11 Questions

Class 11

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Work, Energy, Power and Collision

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Power

$A$ car of mass $1250 \ kg$ is moving with a velocity of $30 \ m/s$. If the engine delivers $30 \ kW$ of power and the resistive force acting on the car is $750 \ N$,find the maximum acceleration of the car.

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$A$ quarter horsepower motor runs at a speed of $600 \text{ r.p.m.}$ Assuming $40\%$ efficiency,the work done by the motor in one rotation will be:

Medium

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$A$ car of mass $m$ is driven with constant power $P$. If it starts from rest,find its velocity $v$ after traveling a distance $x$.

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$A$ $750 \,W$ motor drives a pump which lifts $300 \,L$ of water per minute to a height of $6 \,m$. The efficiency of the motor is nearly (Take,acceleration due to gravity to be $10 \,m/s^2$) (in $\%$)

MediumKVPY 2011

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$A$ man of mass $80 \ kg$ climbs a ladder of height $6 \ m$ in $10 \ s$. What is the average power generated by him in $HP$ (Horsepower)?

Difficult

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Which of the following must be known in order to determine the power output of an automobile?

Similar Questions

$A$ car of mass $1250 \ kg$ is moving with a velocity of $30 \ m/s$. If the engine delivers $30 \ kW$ of power and the resistive force acting on the car is $750 \ N$,find the maximum acceleration of the car.

$A$ quarter horsepower motor runs at a speed of $600 \text{ r.p.m.}$ Assuming $40\%$ efficiency,the work done by the motor in one rotation will be:

$A$ car of mass $m$ is driven with constant power $P$. If it starts from rest,find its velocity $v$ after traveling a distance $x$.

$A$ $750 \,W$ motor drives a pump which lifts $300 \,L$ of water per minute to a height of $6 \,m$. The efficiency of the motor is nearly (Take,acceleration due to gravity to be $10 \,m/s^2$) (in $\%$)

$A$ man of mass $80 \ kg$ climbs a ladder of height $6 \ m$ in $10 \ s$. What is the average power generated by him in $HP$ (Horsepower)?

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