Potential Energy (g)
What is the Essential Question for PE (gravitational)?
Is it above the ground?
What is the Essential Question for KE?
Does it move!?
What is the Essential Question for elastic potential energy?
Is it stretched or compressed?
If you drop a 4kg ball from a height of 12m, how fast will it go when it reaches the ground?
15.34 m/s
Consider the Titan (the rollercoaster). What type(s) of energy does a roller coaster car have, assuming the bottom of the drop is “ground level”?
PE and KE; constant mechanical energy
How much gravitational potential energy does a 5kg statue have if it is sitting 3.7m off of the ground?
181.3 J
A rifle can shoot a .00520 kg bullet at a speed of 985 m/s. What is the kinetic energy of the bullet when it leaves the rifle?
2522.585 J
Calculate the spring constant of a spring if it has 62.4 Joules of energy when compressed 0.51 meters.
k= 479.8 N/m
A rocket is shot upwards with an initial velocity of 85 m/s. How far above the ground is the rocket when it has a velocity of 42 m/s?
278.6 m
If a diver jumps 5m/s up off of the 10m diving board what will his velocity be the instant he hits the water?
14.87 m/s
A 90.0 kg rock climber ascends 85.0 meters up to the top of a rock quarry. Find the potential energy of the climber at the top of the rock.
7.497 x 104 J
Tom Schimmer is running incredibly late for work and is doing the irresponsible thing and driving recklessly. If his car has a Kinetic energy of 1,498,567.5 J and the car has a mass of 1500 kg, what is his dangerous velocity?
44.7 m/s
A 8.8 kg mass compresses a spring (k=111 N/m) horizontally a distance of 0.55 m. When the spring reaches its resting position, how fast is the mass moving?
1.95 m/s
A man riding a motorcycle approaches a hill at a speed of 37.9 m/s. The man and the motorcycle have a combined mass of 195 kg. If they coast up the hill, how far up the hill will they travel before stopping?
73.286 m
Sketch a graph of how the PE and KE energy changes as an apple falls off a tree.
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