$A$ force of $5 \ N$ acts on a stationary body of mass $15 \ kg$. What is the work done during the first second of motion?

Which of the following is a scalar quantity?

If a force of constant magnitude acts in a direction perpendicular to the motion of a particle,then its

Show that a force that does no work must be a velocity-dependent force.

$A$ force acts on a $30 \,g$ particle in such a way that the position of the particle as a function of time is given by $x = \alpha t^2$, where $x$ is in metre, $t$ is in seconds and $\alpha = 1 \,m/s^2$. The work done during the first $4 \,s$ is (in $J$)

If work is done by a body against a force,is the work considered positive or negative?