Free Fall Basics
In this classroom, if we dropped a bowling ball and a feather, which would hit the ground first? Why?
The bowling ball would hit first, because of air resistance.
Ms. Das drops a watermelon from the top of a 120 m tall cliff. Ignore air resistance. What is the initial velocity of the watermelon?
INCLUDE UNITS!
0 m/s
What is the acceleration due to gravity? You must include the correct units for acceleration.
9.8 m/s2 or 10 m/s2
What do vi and vf stand for?
Initial velocity and final velocity
What state is Mrs. Ramos originally from?
Texas! However she was born in Florida
On the moon, a place without air, if a bowling ball and a feather were dropped, which would hit the ground first? Why?
They will hit the ground at the same because there is no air resistance on the Moon
Ms. Das drops a watermelon from the top of a 120 m tall cliff. Ignore air resistance. How fast will the watermelon be traveling after 2 seconds?
20 m/s
What is the definition of a projectile?
An object that is only affected by the force of gravity.
What do A and T stand for?
Acceleration and Time
Who won the Super Bowl this past Winter?
Name two properties of falling objects that can affect the amount of air resistance they feel.
Mass, shape, aerodynamics, speed, velocity, and maybe others.
Mrs. Ramos drops a watermelon from the top of a 120 m tall cliff. Ignore air resistance. How far will the watermelon have fallen after 4 seconds?
80 m
You throw an object full speed off of the side of a cliff. Ignore air resistance.
1. How does the object's vertical velocity change?
2. How does the object's horizontal velocity change?
1. The vertical velocity increases (in the downwards direction).
2. The horizontal velocity is constant (does not change).
Who was the first teacher Ms. Das substitute taught for at CLS?
Mrs. Huckeby
What physicist discovered Free Fall and who did he disprove?
Galileo disproved Aristotle
Mrs. Ramos drops a watermelon from the top of a 120 m tall cliff. Ignore air resistance. How long will it take the watermelon to hit the ground?
4.9 seconds
You toss a ball up into the air. Ignoring air resistance, how does its acceleration change?
The acceleration does not change.
When is g negative? When is g positive?
g is negative if the object is moving upward. g is positive when the object is moving downward
What is the last day of school this year?
May 27th
A ball is tossed upwards and falls back to Earth. When is the ball traveling the fastest? Ignore air resistance.
HINT: Two answers.
Right after it is released and right before it hits the ground.
Eliza and Gage throw a helpless student up into the air with a velocity of 150 m/s. How long will it take for the student to reach the peak? How high do they go?
15 seconds
1125 m
Which would hit the ground 1st, a dropped ball from rest or a bullet fired perfectly horizontally from the same height. Ignore air resistance.
They would hit the ground at the same time.
When does an object's velocity equal zero for an instant of time?
When was Christian Life School founded?
1977