Physical Science 15.1

Fill in the Blank

A 0.10-kilogram bird is flying at a constant speed of 8.0 m/s. What is the bird’s kinetic energy?

Fill in the Blank

A 70.0-kilogram man is walking at a speed of 2.0 m/s. What is his kinetic energy?

Fill in the Blank

A 1400-kilogram car is moving at a speed of 25 m/s. How much kinetic energy does the car have?

Multiple Choice

How are work & energy related?

• energy is the rate of doing work

• work is a form of energy

• work is the transfer of energy

• energy is created by work

Multiple Choice

A moving object with a mass of 10 kg has 320 J of kinetic energy due to its motion. How fast is the object moving?

• 64 m/s

• 32 m/s

• 8 m/s

• 10 m/s

Multiple Choice

Which of these is an example of elastic potential energy

• bow prepared to relase an arrow

• rubber ball thrown into the air

• a book about to fall from a table

• a truck pulling a trailer

Multiple Choice

A small airplane and a helicopter have identical masses. If the airplane’s altitude compared to the ground is three times that of the helicopter, how much more gravitational potential energy does the airplane have than the helicopter

• .333 times as much

• 3 times as much

• 6 times as much

• 9 times as much

Multiple Choice

The energy stored in the bonds between atoms of a compound is called

• electromagnetic energy

• chemical energy

• atomic energy

• thermal energy