A flexible chain of weight $W$ hangs between two fixed points $A$ and $B$ which are at the same horizontal level. The inclination of the chain with the horizontal at both the points of support is $\theta$. What is the tension of the chain at the mid point?
- A$\frac{W}{2} \cdot \operatorname{cosec} \theta$
- B$\frac{W}{2} \cdot \tan \theta$
- C$0$
- D$\frac{W}{2} \cdot \cot \theta$
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In the figure, the tension in the horizontal cord is $30\,N$. Find the weight of the body $B.$ ............ $N$
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A particle of mass $m$ is constrained to move on $x$-axis. A force $F$ acts on the particle. $F$ always points toward the position labeled E. For example, when the particle is to the left of $E$, $F$ points to the right. The magnitude of $F$ is constant except at point $E$ where it is zero.
The system is horizontal. $F$ is the net force acting on the particle. The particle is displaced a distance A towards left from the equilibrium position $E$ and released from rest at $t=0$
What is the period of the motion?
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What is the period of the motion?
Give the magnitude and direction of the net force acting on a stone of mass $0.1\; kg$,
$(a)$ just after it is dropped from the window of a stationary train,
$(b)$ just after it is dropped from the window of a train running at a constant velocity of $36 \;km/h$,
$(c)$ just after it is dropped from the window of a train accelerating with $1\; m s^{-2}$,
$(d)$ lying on the floor of a train which is accelerating with $1\; m s^{-2}$, the stone being at rest relative to the train.
Neglect air resistance throughout.
Give the magnitude and direction of the net force acting on a stone of mass $0.1\; kg$,
$(a)$ just after it is dropped from the window of a stationary train,
$(b)$ just after it is dropped from the window of a train running at a constant velocity of $36 \;km/h$,
$(c)$ just after it is dropped from the window of a train accelerating with $1\; m s^{-2}$,
$(d)$ lying on the floor of a train which is accelerating with $1\; m s^{-2}$, the stone being at rest relative to the train.
Neglect air resistance throughout.
What are concurrent forces ? Explain equilibrium of particle under effect of concurrent forces.
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