A particle is moving in a horizontal circle with constant speed. It has constant

A $120\, g$ mass has a velocity $\vec v = 2\hat i + 5\hat j\,m{s^{ - 1}}$ at a certain instant. Its kinetic energy is .................. $\mathrm{J}$

A stationary particle breaks into two parts of masses $m_A$ and $m_B$ which move with velocities $v_A$ and $V_B$ respectively. The ratio of their kinetic energies $\left(\mathrm{K}_B: \mathrm{K}_{\mathrm{A}}\right)$ is :

A spring is compressed between two toy carts of masses $m_1$ and $m_2$. When the toy carts are released the spring exerts equal and opposite forces for the same time $t$ on each toy cart. If the coefficients of friction $\mu $ between the ground and the toy carts are equal, then the displacement of the toy carts are in the ratio

The kinetic energy of a body decreases by $36\%$. The decrease in its momentum is ............... $\%$

The energy which an ${e^ - }$ acquires when accelerated through a potential difference of $1 \,volt$ is called