Sunil Batra Solutions for Chapter: Force and Laws of Motion, Exercise 1: Formative Assessment

A mass of $1 \mathrm{kg}$ is tied to a string as shown in the figure.

Find the force exerted by the mass on the string ($\mathrm{g}=9.8 \mathrm{m} {\mathrm{s}}^{-2}$).

A mass of $1 \mathrm{kg}$ is tied to a string as shown in the figure.

Find the force exerted by the string on the mass. ($\mathrm{g}=9.8 \mathrm{m} {\mathrm{s}}^{-2}$)

A mass of $1 \mathrm{kg}$ is tied to a string as shown in the figure.

Find the force exerted by the string on the support at A. ($\mathrm{g}=9.8 \mathrm{m} {\mathrm{s}}^{-2}$)

A mass of $1 \mathrm{kg}$ is tied to a string as shown in the figure.

Find the force exerted by the rigid support on the string. (Take $g=9.8 \mathrm{m} {\mathrm{s}}^{-2}$)

_____ external force causes acceleration in a body.
(Choose one of the following: Unbalanced / Balanced).

An isolated force is _______ .

A large truck and a car, both moving with a velocity of magnitude $v$, have a head-on collision after which both of them comes to halt. Which vehicle experiences the greater force of impact?

A boy of mass $50 \mathrm{kg}$ running at $5 \mathrm{m} {\mathrm{s}}^{-1}$ jumps on to a trolley of $20 \mathrm{kg}$ travelling in the same direction at $1.5 \mathrm{m} {\mathrm{s}}^{-1}$. Find their common velocity.