Equilibrium Of Concurrent Forces MCQ - Practice Questions with Answers

A light spring balance hangs from the hook of the other light spring balance and a block of mass M Kg hangs from the former one. Then the true  statement about the scale reading is :

Three forces start acting simultaneously on a particle moving with velocity $\overrightarrow{v}$. These forces are represented in magnitude and direction by the three sides of a triangle ABC (as shown ). The particle will now move with velocity

A car is moving on a plane inclined at ${30}^a$ to the horizontal with an acceleration of $10{\mathrm{ms}}^{-2}$ parallel to the plane upward. A bob is suspended by a string from the roof of the car. The angle in degrees which the string makes with the vertical is: (Take $\mathrm{g}=10{\mathrm{ms}}^{-2}$ )