Q10 of 82 Page 76

Suppose you are running fast in a field when you suddenly find a snake in front of you. You stop quickly. Which force is responsible for your deceleration?

When you will see the snake you actually push the ground from your toe so that the horizontal component of the force pushed by earth is opposite to your motion and you stop. The force responsible for the deceleration is friction.


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Figure (5-Q1) shows a light spring balance connected to two blocks of mass 20 kg each. The graduations in the balance measure the tension in the spring. (a) What is the reading of the balance? (b) Will the reading change if the balance is heavy, say 20 kg? (c) What will happen if the spring is light but the blocks have unequal masses?


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