Class 9 Physics Krishna performs an experiment to establish the relation between weight of a rectangular wooden block lying on a horizontal surface and minimum force required to jsut move it using a spring balance. If the weight of the wooden block is 300 gwt and two known weights of 100 gwt each are to be successively plcaed on the wooden block to take more readings, then which one of the following spring balances would you select to obtain best result. It is known that a force of 90 gwt is required to just move the block on the surface. (a) Range 0-100 gwt; least count 1 gwt (b) Range 0-200 gwt; least count 2 gwt (c) Range 0-250 gwt; least count 2 gwt (d) Range 0-500 gwt; least count 2 gwt Give reason for your answer.

Class 9 Physics

Krishna performs an experiment to establish the relation between weight of a rectangular wooden block lying on a horizontal surface and minimum force required to jsut move it using a spring balance. If the weight of the wooden block is 300 gwt and two known weights of 100 gwt each are to be successively plcaed on the wooden block to take more readings, then which one of the following spring balances would you select to obtain best result. It is known that a force of 90 gwt is required to just move the block on the surface.

(a) Range 0-100 gwt; least count 1 gwt
(b) Range 0-200 gwt; least count 2 gwt
(c) Range 0-250 gwt; least count 2 gwt
(d) Range 0-500 gwt; least count 2 gwt

Give reason for your answer.