Physical Science Ch.15 Sections 1 & 2

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A 0.15 kg. ball is dropped from the top of a 150m. building. What is the kinetic energy of the ball when it passes the sixteenth floor at a height of 63m.?

130 J

A 50 kg. wolf is running at 10 m/sec. What is the wolf's kinetic energy?

2500 J

Which of the following is not an example of kinetic energy being converted to potential energy? a) a basketball player jumping for a rebound b) releasing a compressed spring c) squeezing a rubber ball d) pulling a sled up a hill e) a swing moving upward

b) releasing a compressed spring

Energy stored in the bonds b/w atoms is called

chemical energy

Which form of energy does a plant store when light is transformed during photosynthesis

chemical energy

The law of conservation of energy states that

energy cannot be created or destroyed

The energy of a moving object is ___

kinetic energy

If the speed of an object doubles, its kinetic energy ____

quadruples

An example of electromagnetic energy is ____

sunlight

Mechanical energy is

the sum of the kinetic and potential energy of an object

Most renewable energy originates from

the sun

where does the pendulum have maximum potential energy?

a and e (at the ends)

An example of the conversion of gravitational potential energy into kinetic energy is

a falling raindrop

An example of an object having elastic potential energy is___

a stretched spring

Which of the following energy resources accounts for most of the world's present energy use?

fossil fuels


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