DATA In a physics lab experiment, you release a small steel ball at various heights above the ground and measure the ball’s speed just before it strikes the ground. You plot your data on a graph that has the release height (in meters) on the vertical axis and the square of the final speed (in m 2 /s 2 ) on the horizontal axis. In this graph your data points lie close to a straight line, (a) Using g = 9.80 m/s 2 and ignoring the effect of air resistance, what is the numerical value of the slope of this straight line? (Include the correct units.) The presence of air resistance reduces the magnitude of the downward acceleration, and the effect of air resistance increases as the speed of the object increases. You repeat the experiment, but this time with a tennis ball as the object being dropped. Air resistance now has a noticeable effect on the data, (b) Is the final speed for a given release height higher than, lower than, or the same as when you ignored air resistance? (c) Is the graph of the release height versus the square of the final speed still a straight line? Sketch the qualitative shape of the graph when air resistance is present.
DATA In a physics lab experiment, you release a small steel ball at various heights above the ground and measure the ball’s speed just before it strikes the ground. You plot your data on a graph that has the release height (in meters) on the vertical axis and the square of the final speed (in m 2 /s 2 ) on the horizontal axis. In this graph your data points lie close to a straight line, (a) Using g = 9.80 m/s 2 and ignoring the effect of air resistance, what is the numerical value of the slope of this straight line? (Include the correct units.) The presence of air resistance reduces the magnitude of the downward acceleration, and the effect of air resistance increases as the speed of the object increases. You repeat the experiment, but this time with a tennis ball as the object being dropped. Air resistance now has a noticeable effect on the data, (b) Is the final speed for a given release height higher than, lower than, or the same as when you ignored air resistance? (c) Is the graph of the release height versus the square of the final speed still a straight line? Sketch the qualitative shape of the graph when air resistance is present.
DATA In a physics lab experiment, you release a small steel ball at various heights above the ground and measure the ball’s speed just before it strikes the ground. You plot your data on a graph that has the release height (in meters) on the vertical axis and the square of the final speed (in m2/s2) on the horizontal axis. In this graph your data points lie close to a straight line, (a) Using g = 9.80 m/s2 and ignoring the effect of air resistance, what is the numerical value of the slope of this straight line? (Include the correct units.) The presence of air resistance reduces the magnitude of the downward acceleration, and the effect of air resistance increases as the speed of the object increases. You repeat the experiment, but this time with a tennis ball as the object being dropped. Air resistance now has a noticeable effect on the data, (b) Is the final speed for a given release height higher than, lower than, or the same as when you ignored air resistance? (c) Is the graph of the release height versus the square of the final speed still a straight line? Sketch the qualitative shape of the graph when air resistance is present.
A toy car starts at rest and accelerates up A 40゚ ramp with acceleration a=(t3)1/2. It then flies into the air, and lands back on the ground. If the height of the ramp is h=6m, What is the horizontal distance X?
Against the park ranger's advice, a visitor at a national park throws a stone horizontally
off the edge of a 85 m high cliff and it lands a distance of 90 m from the edge of the cliff,
narrowly missing a visitor below.
What was the initial horizontal velocity of the rock, in m/s? You can round your answer
to the hundredths place and use g = 10 m/s².
Answer:
m/s
A rocket starts from rest and moves upward from the surface of the earth. For the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay= (2.80 m/s^3)t, where the +y direction is upward. a) What is the height of the rocket above the surface of the earth at t = 10.0 s? b) What is the speed of the rocket when it is 325 m above the surface of the earth?
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