Energy Mini-Review

In free fall Captain America has 100% kinetic energy only.

• True
• False

The Law of Conservation of Energy states energy cannot be gained or lost but only transformed.

• True
• False

Friction is one possible source of dissipated energy.

• True
• False

Thor rolling down a hill possesses both E_g and E_k.

• True
• False

The amount of E_Mech that the car has at its lowest point is the same as at its highest point.

• True
• False

Spiderman (mass = 100 kg) is suspended 50 m above the Earth. He begins to fall. His E_g is:

• 4.9 J
• 19.6 J
• 51 J
• 49,000 J

Spiderman (mass = 100 kg) is suspended 50 m above the Earth. He falls. His velocity at 0 m is:

• 1 m/s
• 3.1 m/s
• 9.9 m/s
• 31.3 m/s

Baby Groot (m = 1 kg) falls off of a table! His E_k just before he lands is 100 J. How tall is the table?

• 012 m
• 1.2 m
• 10.2 m
• 100.2 m

 How much E_k is required to throw Wolverine (m = 200 kg) 100 m into the air?

• 19.6 J
• 190.6 J
• 2041 J
• 196,000 J

Peter Quill's ship, The Milano (m = 100,000 kg) has 200,000 J of E_k. How fast is it travelling?

• .25 m/s
• 2 m/s
• 4 m/s
• 16 m/s