Test Details

Report

Work, Energy and Power

Jan 16, 2:00 PM

120 minutes

Jan 16, 4:00 PM

20.0 marks

MCQ

20 questions

MOTION PHYSICS CLASSES

Class Details

Physics

MOTION PHYSICS CLASSES 11

Physics

FOR :- XI , XII , IIT-JEE & NEET

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Question Text

Question 1 :
A body of weight 1 newton has a potential energy of 1 joule relative to the ground when it is at a height of:

Question 2 :
Name the type of energy (kinetic energy $K$ or potential energy $U$) possessed in a compressed spring:

Question 3 :
The gravitational potential energy of a body is ________ to its height above the surface of the Earth.

Question 4 :
In a factory, due to a sudden strike the work usually done in a day took a longer time. Which of the following happened?

Question 5 :
A tennis ball has a mass of $56.7 gm$ and is served by a player with a speed of $180 kmph$. The work done in serving the ball is nearly:

Question 6 :
A ball of mass $m$ is thrown vertically up with an initial velocity so as to reach a height $h$. The correct statement is:

Question 7 :
<p>Two bodies of equal weight are kept at heights of $h$ and $1.5 h$ respectively. The ratio of their P.E. is:</p>

Question 8 :
Simple pendulum of length l has a maximum angular displacement $\theta$. The maximum kinetic energy of the bob is?

Question 10 :
Asha lifts a doll from the floor and places it on a table. If the weight of the doll is known, what else does one need to know in order to calculate the work Asha has done on the doll ?

Question 12 :
The work done by all the forces on a system equals the change in 

Question 13 :
A man of mass $50kg$ climbs up a ladder of height $10m$. Calculate the increase in his potential energy. $(g=9.8ms^{-2})$

Question 15 :
A ball tied at the end of a string and swinging back and forth, at what point in the swing would the ball have the highest potential energy?<br/>

Question 16 :
A body is dropped from a certain height from the ground. When it is halfway down, it possess,

Question 17 :
A man of 30 kg jumps up to a height of 2 m . What is his potential energy at the highest point ? 

Question 18 :
Two bodies of equal weight are kept at heights of $h$ and $1.5  h$ respectively. The ratio of their P.E. is

Question 19 :
Two bodies of equal masses are placed at heights $h$ and $2h$. Find the ratio of their gravitational potential energies.

Question 20 :
A box of weight $150kgf$ has gravitational potential energy stored in it equal to $14700J$. Find the height of the box above the ground. (Take $g=9.8N$ $kg^{-1}$)

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