Work - class-XI
Description: work | |
Number of Questions: 20 | |
Created by: Darshan Khurana | |
Tags: work, energy and power physics work and energy energy and its forms |
The correct relation between joule and erg is:
State the wrong statement
A force $\vec {F} = -k(x\hat {i} + y\hat {j})$, where $k$ is positive constant, acts on a particle moving in the $x-y$ plane. Starting from the origin, the particle is taken along the positive x-axis to the point $(a, 0)$ and then parallel to the y-axis to the point $(a, a)$.
A man carries a load on his head through a distance of 5 m. The maximum amount of work is done when he
A force of $5 N$ is applied on a $20 kg$ mass at rest. the work done in the third second is:-
A small ball bearing is releases at the top of a long vertical column of glycerine of height $2h$. The ball bearing falls through a height $h$ in a time $t _{1}$ and then the remaining height with the terminal velocity in time $t _{2}$ Let $W _{1}$ and $W _{2}$ be the work done against viscous drag over these height. therefore.
No work is done by a force on an object if
A moving particle is acted upon by several forces $F _1, F _2, F _3 .....$ etc. One of the force is chosen, say $F _2$, then which of the following statement about $F _2$ will be true.
The unit kg m$^2$s$^{-2}$ is associated with :
The unit N-s is equivalent to:
Rahul took a wooden cube of volume $1000 {cm}^3$ and put it in water. He observed that $\displaystyle \frac{3}{5}th$ of its volume is below the level of water. Later, he floated the cube in a liquid of density $0.8 g {cm}^{-3}$ and applied extra force on the cube to completely submerge it in the given liquid. Calculate how much extra force Rahul applied on the cube.
1 J is equal to
The c.g.s. unit of work is
One erg is equal to
Select the correct statement for work, heat and change in internal energy
How many electron volts make one Joule?
Water falls from a height of $210\, m$. Assuming whole of energy due to fall is converted into heat the rise in temperature of water would be
($J = 4.3$ Joule/cal)
1 J Is equal to $1 : kg : m : s^{-2}$
Which of the following will give $1J$ of work?
$4.0\times{10}^{-19}J=$