Assignment Details

Work, Energy and Power

1449 minutes

Jan 09, 10:51 PM

25.0 marks

MCQ

20 questions

Alok Kumar

I am Alok Kumar, a graduate from IIT Bombay. And also a part time teacher. I have my researches into Maths and Physics and Technical Sciences.

Class Details

Medical

NEET

Medical

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Question Text

Question 1 :
A man pulls a sledge along a rough horizontal surface by applying a constant force $F$ at an angle $\theta $ above the horizontal. In pulling the sledge a horizontal distance $d$, the work done by the man is:

Question 4 :
The work done in lifting1 kg mass to a height of 9.8 m is about

Question 5 :
Two bodies moving towards each other collide and move away in opposite directions. There is some rise in temperature of bodies because a part of the kinetic energy is converted into

Question 6 :
A particle is moved from $O(0, 0)$ to $P(a, a)$ under a force $\vec{F}=\left(3\hat{i}+4\hat{j}\right)$ from two paths. Path $1$ is OP and path $2$ is OQP. Let $W_1$ and $W_2$ be the work done by this force in these two paths. Then?

Question 7 :
A boy carrying a box on his head is walking on a level road from one place to another on a straight road is doing no work against gravity.<br/>

Question 8 :
If a body moves along a frictionless horizontal surface its weight:

Question 9 :
The slope of the kinetic energy versus position vector gives the rate of change of

Question 12 :
If the heart pushes 1 cc of blood in one second under pressure 20000 $N/m^2$ the power of heart is:

Question 15 :
If force and displacement of particle in direction of force are doubled. Work would be

Question 16 :
When we pay for our electricity bill, we are paying for the ____________.

Question 17 :
If a machine gun fires {tex}n{/tex} bullets per second each with kinetic energy {tex} \mathrm { K } , {/tex} then the power of the machine gun is

Question 18 :
What power must a sprinter, weighing 80 kg, develop from the start if he has to impart a velocity of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5e940f1b7b6ff3012e76e64f"> to his body in 4 s?

Question 19 :
Consider the following two statements <br> 1. Linear momentum of a system of particles is zero <br> 2. Kinetic energy of a system of particles is zero, <br> Then

Question 20 :
Power of a water pump is $ 2 \quad kW $ if $ g = 10m /sec^2 $ the amount of water it can raise in one minute to a height of $ 10 \quad m $ is

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