A spring balance is a simple device consisting of a coiled spring which gets stretched when a load is hanged at its lower end. Stretching of spring is measured by a pointer moving on a graduated scale. The reading on scale gives the magnitude of force. Now a string is tied around a wooden block and is pulled by a spring balance as shown in figure.
Answer the following question.
(a) Which force can be measured by a spring balance when a load is hanged at its lower end? What is its unit?
(b) State the factors that determine the magnitude of force acting on an object?
(c) The reading on spring balance will give you a measure of which force when the block shown in the figure just begins to move?
(d) If now an additional weight is put on the block what change will you observe in reading of spring balance? Why?
Answers
A spring balance is a simple device consisting of a coiled spring which gets stretched when a load is hanged at its lower end. Stretching of spring is measured by a pointer moving on a graduated scale. The reading on scale gives the magnitude of force. Now a string is tied around a wooden block and is pulled by a spring balance as shown in figure.
Answer the following question.
(a) Which force can be measured by a spring balance when a load is hanged at its lower end? What is its unit?
(b) State the factors that determine the magnitude of force acting on an object?
(c) The reading on spring balance will give you a measure of which force when the block shown in the figure just begins to move?
(d) If now an additional weight is put on the block what change will you observe in reading of spring balance? Why?
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