Question

A spring lies along the x-axis attached to a wall at one end and a block at the other end. The block rests on a friction less surface at x = 0. A force of constant magnitude F is applied to the block that begins to compress the spring, until the block comes to a maximum displacement $x_{max}$.
During the displacement, which of the curves shown in the graph best represents the kinetic energy of the block?

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is C 3

Out of the following given graph, we have to find out the graph which is representing $K\epsilon$

At $x=0$, it will start, so, $v=0$ at $x=0$

$\Rightarrow K\epsilon =0$ at $x=0$

At max compression also, $v=0$ so, $K.\epsilon =0$

Only graph $\left(3\right)$ in showing $0$ at $x=0$ and $x=x-max$