
a.
To find: At what instance projectile will be back at ground level.
a.

Answer to Problem 74E
After
Explanation of Solution
Given information:
A projectile is fired upward from ground level
Concept used:
The position equation for a projectile is given as-
Calculation:
A projectile is fired upward from ground level
So,
Using position equation, when projectile hit back at the ground
Therefore, projectile will hit the ground after
b.
To find: When the height of the projectile be less than
b.

Answer to Problem 74E
Height of the projectile is less than
Explanation of Solution
Given information:
A projectile is fired upward from ground level
Concept used:
The position equation for a projectile is given as-
Calculation:
A projectile is fired upward from ground level
So,
Using position equation, when height of the projectile is less than
Therefore, height of the projectile is less than
Chapter 2 Solutions
EBK PRECALCULUS W/LIMITS
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