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Muscular Force

When a rubber...

Question

When a rubber balloon held between the hands is pressed, its shape changes. This happens because :

(a) balanced forces act on the balloon
(b) unbalanced forces act on the balloon
(c) frictional forces act on the balloon
(d) gravitational forces act o the balloon

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Solution

(a) balanced forces act on the balloon.
Balanced forces are responsible for bringing about a change in the shape of an object.

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Q. (a) What do you understand by the terms "balanced forces" and "unbalanced forces"? Explain with examples.
(b) What type of forces − balanced or unbalanced − act on a rubber ball when we press it between out hands? What effect is produced in the ball?

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Q. Question 16

A gas filled balloon moves up. Is the upward force acting on it larger or smaller than the force of gravity?

Question 16

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