Three blocks are placed as shown in figure. Mass of A, B and C are m₁, m₂ and m₃ respectively.

English

Gujarati

Hindi

4-1.Newton's Laws of Motion

easy

Three blocks are placed as shown in figure. Mass of $A, B$ and $C$ are $m_1, m_2$ and $m_3$ respectively. The force exerted by block ' $C$ ' on ' $B$ ' is .........

A$m_1 g$

B$\left(m_1+m_2\right) g$

C$m_2 g$

D$\left(m_1+m_2+m_3\right) g$

Solution

(b)
$N_2=N_1+m_2 g=m_1 g+m_2 g$
$N_2=\left(m_1+m_2\right) g$
is $N_2$ only $=\left(m_1+m_2\right) g$

Standard 11

Physics

Share

Similar Questions

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

hard

Define force. What is contact force ? Write two example of field force.

medium

A piece of wire is bent in the shape of a parabola $y=k x^2$ ( $y$-axis vertical) with a bead of mass $m$ on it. The bead can slide on the wire without friction. It stays at the lowest point of the parabola when the wire is at rest. The wire is now accelerated parallel to the $x$-axis with a constant acceleration $\alpha$. The distance of the new equilibrium position of the bead, where the bead can stay at rest with respect to the wire, from the $y$-axis is

hard

(IIT-2009)

There are four forces acting at a point $P$ produced by strings as shown in figure. Which is at rest ? Find the forces $F_1$ and $F_2$.

medium

An iron sphere weighing $10\, N$ rests in a $V$ shaped smooth trough whose sides form an angle of $60^o$ as shown in the figure. Then the reaction forces are

normal