Question

Observe around you and find five examples for the following
a) work is done
b) work is not done
c) decreasing pressure
d) increasing pressure

plz need your help for above work...​

Answer 1

Explanation:

WORK IS DONE :

1- PUSHING A CAR AND THE CAR MOVES SOME DISTANCE

2- A PERSON MOVING ALONG A STRAIGHT ROAD

3- KIDS PLAYING IN PARK

4- PULLING A CYCLE OR RICKSHAW

5- RUNNING BY ATHELETES IN OPPOSITE DIRECTIONS

# WORK IS NOT DONE:

1. MAN PUSHING A WALL

2. KOOLI STANDING STRAIGHT WITH HEAVY WEIGHT ON ITS HEAD

3.BOY LOOKING AT SKY IN STILL POSITION

4.THIN BOY PUSHING A CAR BUT NO MOVEMENT IS SHOWN BY THE CAR.

5. THROWING A BALL PERPENDICULARLY

Answer 2

Answer:

Work is done: A moving fan.

Work is not done or in other words, the object is in rest: A still book.

Decreasing pressure: Your body weight is more but the contact area of the feet reduces the pressure on the sand and so your feet do not sink.

Increasing pressure: A sharp knife cuts more effectively than a blunt knife as it has a very small surface area and exerts more pressure.