11/19 test review

Stored energy or energy due to its position is called

• mechanical energy

• potential energy

• kinetic energy

• thermal energy

Which of the following statements about a skier skiing down a steep slope is true?

• His kinetic energy decreases and his potential energy increases

• His potential energy decreases and his kinetic energy increases

• His chemical energy increases

• Both his potential and kinetic energy increases

Which letter shows where is potential energy stored or at its maximum point?

• Y

• W

• X

• Z

Potential energy depends on ______ and _______.

• height, mass

• weight, mass

• speed, mass

• height, speed

Which letter shows where kinetic energy is at is highest point?

• X

• Y

• W

• Z

Kinetic energy depends on the ________ and ________ of the object.

• Height (position)

• Mass

• Speed

• Friction

How much gravitational potential energy does a 100kg (220lb.) skydiver have if they jump from 4000 meters?

• 3920000 J

• 294 J

• 180000 J

• 1225 J

A 6kg cat misjudges a jump and falls 5 meters. How much gravitational potential energy does the cat have? (The cat is fine by the way.)

• 294 J

• 180000 J

• 1225 J

• 3920000 J

Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level.

• 250,000 J

• 2,450,000 J

• 2,451,663 J

• 248 J

A 50kg person is running at 7m/s (about 16 mph). How much kinetic energy do they have?

• 1225 J

• 180000 J

• 294 J

• 3920000 J