Physics Demonstration

1
Physics Demonstration

• Potential Energy to Kinetic Energy
• Dominic Florin

2
Potential Energy

• A rock on top of a hill has a potential to do
  work.
• The top of the hill is a high energy state and
  the bottom of the hill is a lower energy state.

3
Kinetic Energy

• If the rock is allowed to roll down the hill,
  then the potential energy is converted into
  kinetic energy.
• Kinetic energy is the energy that a moving object
  has.

4
Conservation of Energy

• The Kinetic Energy could then be converted back
  into potential energy.
• The energy can be split into Potential Energy
  and/or Kinetic Energy

5
Friction

• Most of the time friction will slow the object
  down
• Friction always acts opposite to the direction of
  motion

6

• For this system the Potential Energy (PE) is
  going to be exchanged for Kinetic Energy (KE) and
  this will give the mass some velocity
• PEKE
• Mgh1/2Mv2
• v(2gh).5
• g32.2 ft/s2 or
• 9.81 m/s2

7

• The mass is then cut off of the string at the
  bottom of the swing.
• Next find how long it will take the object to
  fall from the bottom of the swing to the top of
  the cup.
• Y1/2gt2
• t(2Y/g).5

8

• The horizontal displacement will be the velocity
  multiplied by the time.
• Dvt
• This is where the box should be to catch the
  falling mass.
• Good Luck!

9

• What about using different masses, does that
  change where the box is placed?
• How does the length of string effect the position
  of the box?