Question

c) may increase
12. When we stretch the rubber bands using fingers. The net force ezerted on
fingers by the rubber bands
a) increase with number
b) decreases with number
c) becomes zero
d) sometimes become zero​

Answer 1

When we stretch the rubber bands using fingers. The net force exerted on fingers by the rubber bands increases with the number. (option A)

• The rubber band is being loosened up. The band needs to push back to pack size that then, at that point, makes a force that pulls the two ends of the rubber band.

Now let us say that the force exerted by one rubber band is F units and the second rubber band is also F units. Therefore, the combined force on the finger would increase as, F+F=2F Newton

• similarly,                                                                                                       If three rubber bands are used the net force = F + F + F = 3F                 If four rubber bands are used the net force = F + F + F + F = 4F

Hence, the correct answer is option A