Concept explainers
The final velocity and distance covered by the bag when it has fallen for 2.0s.
Answer to Problem 73A
Explanation of Solution
Given:
A bag is dropped from a helicopter and has fallen for 2.0s.
Formula used:
Final velocity with constant acceleration can be obtained by:
Where,
The distance traveled by an object with a constant acceleration can be obtained by:
Here, d represents displacement, v represents velocity, t represents time and a is the acceleration.
Calculation:
Since, the bag is dropped from a helicopter, thus its initial velocity will be 0, that is,
Acceleration acting on it will be due to gravity only (as air resistance is to be ignored). Thus,
Now, using the above-mentioned formula for the velocity, the final velocity of the bag after 2.0s will be:
Assuming the initial distance to be 0, then
Then, the distance covered in the time 2.0 s will be,
Conclusion:
Thus, the final velocity of the bag and distance covered by the bag in the given time is
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