**Please answer what you can will vote lifesaver!!!*** When we did projectile mo

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**Please answer what you can will vote lifesaver!!!***

When we did projectile motion ignoring air resistance, the only force we considered on the projectile was gravity. Now consider a projectile with air resistance or drag, too.
All of the following questions refer to the time period after you have thrown the object, and before it hits the ground. Nothing but the air is touching it.

a) Suppose you throw an object straight up. List the forces on the object, and give the direction of each, while it is moving up.


b) What direction is the acceleration of the object, while it is moving up?

c) Same object at the instant it hits its peak. List the forces on the object, and give the direction of each.

d) What direction is the acceleration of the object now?

e) Same object just after it starts back down. List the forces on the object, and give the direction of each.

f) What direction is the acceleration of the object now?

g) Same object, on its way down, after it has reached terminal velocity. List the forces on the object, and give the direction of each.

h) What is the acceleration of the object now?

i) Finally, suppose you've thrown an object up at an angle theta to the horizontal (rather than straight up). List the forces on the object, and give the direction of each, at the highest point in its trajectory.

j) What direction is the acceleration of the object at that moment?

Explanation / Answer

(a) Gravity,Air Resistance both downwards (b) opposite the motion of the body (c) Gravity downwards (d) Acceleration is zero (e) Gravity downwards,Air Resistance upwards (f) Acceleration is downwards (g) Gravity downwards,Air Resistance opposite to the motion of the body (h) Acceleration is zero (i) Gravity downwards, Air Resistance makes an angle theta downwards with respect to horizantal (j) Acceleration is zero

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