Question

The 2 kg block shown in figure (top view) rests on a smooth horizontal surface and is attached to a massless elastic cord that has a stiffness $5\frac{N}{m}$

The cord hinged at O is initially unstretched and always remains elastic. The block is given a velocity v of $1.5\frac{m}{s}$ perpendicular to the cord. The magnitude of velocity in $\frac{m}{s}$ of the block at the instant the cord is stretched by 0.4 m is

• A. 1.36
• B. 1.07
• C. 0.83
• D. 1.50

Answer 1

The correct option is A 1.36

a