A particle of mass $'m'$ and charge $'q'$ is accelerated through a potential difference of $'V'$ volt. Its energy is
$qV$
$mq\,V$
$\left( {\frac{q}{m}} \right)\,V$
$\frac{q}{{m\,V}}$
The machine as shown has $2$ rods of length $1\, m$ connected by a pivot at the top. The end of one rod is connected to the floor by a stationary pivot and the end of the other rod has a roller that rolls along the floor in a slot As the roller goes back and forth, a $2\, kg$ weight moves up and down. If the roller is moving towards right at a constant speed, the weight moves up with a
A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by $1\,m/s$ so as to have same K.E. as that of the boy. The original speed of the man will be
If the momentum of a body is increased $n$ times, its kinetic energy increases
If the kinetic energy of a body becomes four times of its initial value, then new momentum will
What is the shape of the graph between the speed and kinetic energy of a body