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Free Fall Worksheet

Last updated almost 6 years ago
14 questions

Free Fall

  • An object is in free-fall when there is nothing that inhibits its fall to the earth.
  • ΣF = -Fg = m(-a) *no air resistance
  • The acceleration it experiences is due to the force of attraction to the Earth.
  • In close proximity to earth, the value of this acceleration is 9.8 m/s2.
  • Since this acceleration is always directed to the center of the earth, we call it a negative acceleration or - 9.8 m/s2.
  • The symbol for this acceleration is “ag” or sometimes just “g”
  • Because the acceleration due to gravity is a constant, the 3 equations of motion can be utilized.
vf=vi+at
Δx=vit+1/2at2
vf2=vi2+2aΔx

Round answer to the nearest tenth.
1

I want to calculate how high I can throw a ball. If I throw it straight up in the air and it leaves my hand at 7 m/s. How would I label 7 m/s?

1

I want to calculate how high I can throw a ball. If I throw it straight up in the air and it leaves my hand at 7 m/s. Which variable is 0?

1

I want to calculate how high I can throw a ball. If I throw it straight up in the air and it leaves my hand at 7 m/s. Which variable is 0?

1

How quickly is the velocity changing as the ball moves upward?

1

How quickly is the velocity changing as the ball pauses at the top?

1

How quickly is the velocity changing as the ball falls downward?

1

A ball is dropped from rest at a height of 3.7 m. How fast will it be going just prior to hitting the ground?

1

A ball is thrown upward with an initial velocity of 8.52 m/s. How high will it go?

Look back at 7 & 8 and compare the distances and speeds. If you a ball leaves your hand at 5 m/s, it reaches a height of 1.27 m. If you drop a ball from 1.27 m, it will land in your hand at 5 m/s.
Similarly, if you throw a ball upward at 5 m/s, it will take 0.51 seconds to reach the top. If you drop a ball, it will take 0.51 seconds to reach a speed of 5 m/s.
If you throw a ball with 5 m/s and it lands back in your hand, the displacement is 0 and using the second motion equation, you will find the toss took 1.02 seconds.
1

An egg is dropped from rest. How fast will it be going 0.1 seconds later?

1

An egg is dropped from rest. How far will it have fallen after 0.1 seconds?
Report answer to thousandth place.

1

An egg is dropped from rest. How long will it take for the egg to hit the floor 1.2 meters below its release point?

1

An egg is dropped from rest. How fast will it be going just prior to hitting the floor 1.2 m below its release point?

1

A ball is thrown upward at an initial velocity of 4.9 m/s. How long it will take the ball to reach its zero velocity point (the peak of its motion)?

1

A ball is thrown upward at an initial velocity of 4.9 m/s. What is its acceleration at that point?