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Physics Unit 3

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a) The time it takes for the object to hit the ground will remain constant because earth's gravity pulls on every object with the same amount of force. The object will accelerate towards the earth at 9.8m/s^2.
b) The rock will hit the ground farther away from where it was thrown, if it is thrown harder, but it will still hit the ground at the same exact time as the rock thrown softer or even dropped.
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a) The time it takes for the object to hit the ground will remain constant because earth's gravity pulls on every object with the same amount of force. The object will accelerate towards the earth at 9.8m/s^2.
b) The rock will hit the ground farther away from where it was thrown, if it is thrown harder, but it will still hit the ground at the same exact time as the rock thrown softer or even dropped.
You throw a rock horizontally. In a second horizontal throw, you throw the rock harder, and give it more speed.
a) How will the time it takes the rock to hit the ground be affected?
b) How will the increased speed affect the distance from where the rock left your hand to where the rock hits the ground?
8.4m
You took a running leap off a high-diving platform. You were running at 2.8m/s and hit the water 2.6s later. How high was the platform, and how far from the edge did you hit the water? Ignore air resistance.
a) d= 30m
b) 34.3m/s
An arrow is shot at 30 degrees above the horizontal. Its velocity is 49m/s, and hits the target.
a) What is the maximum height the arrow will attain?
b) The target is at the height from which the arrow was shot. How fast is it?
Horizontal motion will be uniform while vertical motion will be affected due to gravity. Horizontal motion and vertical motion can be independent of each other.
Analyze how horizontal motion can be uniform while vertical motion is accelerated. How will projectile motion be affected when drag due to air resistance is taken into consideration?
The airplane travels the same distance and will be exactly vertically above the point where the crate hits the ground.
An airplane flying at constant velocity and altitude drops a heavy crate. Ignoring air resistance, where will the plane be relative to the crate when it hits the ground?