# A bag of ballast is accidentally dropped from a balloon which is stationary at an altitude of 4900m. How long does it take for the bag to hit the ground?

##### 2 Answers

Mar 5, 2018

#### Explanation:

A good equation to know for calculating time of falls due to gravity alone is:

Here, we can use

Mar 5, 2018

Use the equations of motion to answer the question.

#### Explanation:

It is given that balloon is stationary at height

As it falls in the downward direction, it accelerates with an acceleration of

So

On solving