Question

which of the following situation demonstrate the use of simple machines?​

Answer 1

Answer:

The question is not complete

Explanation:

Please change it.

Do write the situations also.

Answer 2

Answer:

(a)

Let say a stone is thrown in vertical direction with initial speed u. As the time passes its velocity decreases and at the maximum height it attained, its velocity is zero but it has an acceleration (9.8)m/s

2

in the downward direction due to gravity.

(b)

When a pebble is tied with an end of string and it is whirled in horizontal circular motion with the other end of the string at the centre of circular path, then it has a constant magnitude of centripetal acceleration towards the centre. Hence the acceleration is in perpendicular direction to the motion of pebble.