Newton's Second Law of Motion

A lift weighing $1000 \mathrm{kg}$ is moving upwards with an acceleration of $1 \mathrm{m} {\mathrm{s}}^{-2}$. The tension in the supporting cable is $\left(g=9.8 \mathrm{m} {\mathrm{s}}^{-2}\right)$

Two particles of mass $m$ each are tied at the ends of a light string of length $2a.$ The whole system is kept on a frictionless horizontal surface with the string held tight so that each mass is at a distance $a$ from the centre $P$ (as shown in the figure). Now, the mid-point of the string is pulled vertically upwards with a small but constant force $F.$ As a result, the particles move towards each other on the surface. The magnitude of acceleration, when the separation between them becomes $2x,$ is

A block $P$ of mass $m$ is placed on a horizontal frictionless plane. A second block of mass $m$ is placed on it and is connected to a spring of spring constant $k,$ the two blocks are pulled by distance $A$. Block $Q$ oscillates without slipping. What is the maximum value of frictional force between the two blocks?

Three identical blocks of masses $m=2 \mathrm{kg}$ are drawn by a force $F=10.2 \mathrm{N}$ on a frictionless surface, then what is the tension (in $\mathrm{N}$) in the string between the blocks $B$ and $C$?

A player caught a cricket ball of mass $150 \mathrm{g}$ moving at a rate of $20 \mathrm{m} {\mathrm{s}}^{-1}$. If, the catching process is completed in $0.1 \mathrm{s}$, the force of the blow exerted by the ball on the hand of the player is equal to

The weight of a body depends on its mass but, the mass of the body does not depend on its weight.

Explain weight and how it is different from mass?

What is the concept of mass? What is difference between inertial and gravitational mass ?

What is SI unit of force?

Evaluate the Direction & Magnitude of the Net Force of a Stone of Mass 6 Kg Falling Out of the Window of a Stationary Bus.

The application of force on an object may change its _____.

What is a simple definition of force?

Is force a vector quantity True or false?

The CGS unit of mass is

The S.I unit of force is

Through a smooth fixed cylinder of radius $R$, the axis of which is horizontal, a weightless rope is thrown, to the ends of which a load and a thin uniform rod is attached as shown in the figure. In the position of equilibrium, rod makes an angle $\alpha =30°$ with the horizontal. The distance from the end of rod to which the rope is attached, to the point of contact of the rod and the cylinder is $\frac{R}{\sqrt{2}}$. If mass $M$ of rod is $6 \mathrm{kg}$, then find the value of mass $m$ in $\mathrm{kg}$.

In the diagram shown, no relative motion takes place between the wedge and the block placed on it. The rod slides downwards over the wedge and pushes the wedge to move in horizontal direction. The mass $M$ of wedge is equal to $1 \mathrm{kg}$ and is same as that of the block. If $\tan \theta =\frac{1}{\sqrt{3}},$ find the mass of rod (in kg) (Neglect rotation of the rod)