Question

in which of the following cases net force acting is zero ?also identify the direction of force when
1. a car drives around a circular track at constant speed
2. a person pushes a door to hold it shut
3. a ball, rolling across a grassy field, slowly comes to stop​

Answer 1

Answer:

Explanation:1

Answer 2

In which of the following cases net force acting is zero also identify the directions of the force when

1 a car drives around a circular race track at a constant speed

2 a person pushes a door to hold a Tshirt

3 a ball rolling across the grassy field,slowly comes to stop

Here is Your Answer .....!!!!!

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After looking the following cases we get as .....

The car that is travelling in the circular track is always in equilibrium or rather we can say it has net force as zero ...because the centripetal force and the out ward centrifugal force are balanced so the car is in circular motion ....

The ball rolling on the grass has net force zero when it is at rest because ...when the ball was rolling due to an external applied force ....the grass was applying a frictional force in the opposite direction .....thus this causes net force as zero and the ball comes at the rest .....

And in the second case when the door was shut by the force , the door was at rest position which means net force was zero ...But what will be it's direction ??

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Hope it helps u..