The total time it takes a projectile fired straight up at 10 m/s to reach the top of its path and return to its starting point is about
A)1 s.
B)2 s.
C)10 s.
D)20 s.

Question

Quizplus · Accepted Answer

The time it takes for a projectile to reach the top of its path can be found using the formula:
time = (vertical velocity) / (gravitational acceleration)
In this case, the vertical velocity is 10 m/s and the gravitational acceleration is 9.8 m/s^2. Therefore, the time to reach the top is:
time = 10 m/s / 9.8 m/s^2 = 1.02 s (rounded to two decimal places)
The time to return to its starting point is the same, so the total time is approximately 2 seconds. Therefore, the best choice is B.

The Total Time It Takes a Projectile Fired Straight Up