7. A projectile is launched straight up in the airat a speed of 24 m/s. The para

Question

7. A projectile is launched straight up in the airat a speed of 24 m/s. The parachute fails and the projectile falls(free fall) back to earth. What is the total time the projectile isin flight?: *

4.9 s

3.2 s

8.6 s

9.7 s

Please respond to the question above.

7. A projectile is launched straight up in the airat a speed of 24 m/s. The parachute fails and the projectile falls(free fall) back to earth. What is the total time the projectile isin flight?: *

4.9 s

3.2 s

8.6 s

9.7 s

Please respond to the question above.

Explanation / Answer

set up the equations of motion: a=-9.8 v=-9.8*t+24 h=-4.9*t2+24t the projectile hits the ground when h=0: h=-4.9*t2+24t=0 t=4.90 seconds. so the answer is the first one.

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