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In: Physics

A stone with a weight of 5.25 N is launched vertically from ground level with an...

A stone with a weight of 5.25 N is launched vertically from ground level with an initial speed of 19.0 m/s, and the air drag on it is 0.261 N throughout the flight. What are (a) the maximum height reached by the stone and (b) its speed just before it hits the ground?

Solutions

Expert Solution

Given:

Weight of the stone,

Mass of the stone,

Initial vertical speed of the stone,

Drag force,

==============================

(a) What is the maximum height reached by the stone?

Consider the stone

The total energy is conserved

When the stone reaches the maximum height, the initial kinetic energy of the stone is converted into potential energy at maximum height. Due to the drag force, some portion of the initial energy is also lost.

(a) ANSWER:

==========================

(b) What is its speed just before it hits the ground?

Consider the falling part

The total energy is conserved

The potential energy at the maximum height is converted into kinetic energy. Some portion of the potential energy is lost due to drag force

(b) ANSWER:

============================

genius_generous answered 5 months ago

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