question_answer

The machine as shown has 2 rods of length 1 m connected by a pivot at the top. The end of one rod is connected to the floor by a stationary pivot and the end of the other rod has a roller that rolls along the floor in a slot. As the roller goes back and forth, a 2 kg weight moves up and down.

If the roller is moving towards right at a constant speed, the weight moves up with a -  [JEE Online 09-04-2017]

A)   speed which is \[\frac{3}{4}th\] of that of the roller when the weight is 0.4 m above the ground

B)   constant speed

C)   decreasing speed

D)   increasing speed