Objective: • Analyze the motion of objects in free fall
• Graph the displacement, velocity, and acceleration as a function of time for an object in free fall
• Evaluate the effect of gravity on an object in free fall
Consider a ball dropped from rest on Earth where the acceleration due to gravity is g=-98 m/s2. If the
ball is dropped from some height above the ground and falls freely (neglect air resistance), fill out the
table with the displacement (Ay), velocity (v), and acceleration (a) of the ball at each second (t).
Consider down as the negative direction.
Identify known variables at any given
time, t:
Select which equation to use to find displacement,
Ay:
Select which equation to use to find velocity, v
t
Time
sec
0
Ду
Displacement
mn
Velocity
m/s
Acceleration
m/s?
1
2
4
5
6
7
8
9
10
11
12
13
11
15

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.

Which statements describe the movement of ocean currents around the globe? check all that apply. strong winds force warm water to sink to the ocean floor. the coriolis effect causes warm and cold water to mix. cool dense water sinks to the ocean floor. warm water replaces cool surface water. wind blowing parallel to the shore causes upwelling of cool water.

Aball is thrown upward. at a height of 10 meters above the ground, the ball has a potential energy of 50 joules (with the potential energy equal to zero at ground level) and is moving upward with a kinetic energy of 50 joules. what is the maximum height h reached by the ball? consider air friction to be negligible. 1. h ≈ 10 m 2. h ≈ 50 m 3. h ≈ 30 m 4. h ≈ 40 m 5. h ≈ 20 m 003 10.0 points which of the two object shown below has the greatest kinetic energy? a m b 1 2 m v 2v 1. kinetic energies are the same. 2. a 3. b 4. unable to determine. 004 10.0 points tim, with mass 74.6 kg, climbs a gymnasium rope a distance of 3.1 m. the acceleration of gravity is 9.8 m/s 2 . how much potential energy does tim gain? answer in units of j. 005 10.0 points a car is moving at 64 miles per hour. the kinetic energy of that car is 5 × 105 j. how much energy does the same car have when it moves at 111 miles per hour? answer in units of j. 006 10.0 points an 102 kg man climbs up a 1 m high flight of stairs. the acceleration of gravity is 9.81 m/s 2 . w