Reik Physics and Astronomy Quiz

What is the relationship between the density of falling objects and how fast the objects fall through Earth's atmosphere? Assume the surface area and shape of these objects are constant.

• Directly proportional: As density of the object increases, the falling velocity increases.

• Indirectly proportional: As density of the object increases, the falling velocity decreases.

What is the relationship between surface area and how fast an object falls through Earth's atmosphere? Assume the objects have a constant density.

• Directly Proportional: As the surface area increases, the falling velocity increases

• Indirectly Proportional: As the surface area increases, the falling velocity decreases

Nate, Kyleigh, Riku, and Pranav are planning a trip to the Moon. They are packing a parachute to go skydiving! Why might this be a bad idea?

• The moon has less surface gravity than the Earth

• The moon has more surface gravity than the Earth

• The moon has no atmosphere, so there would be no air resistance to slow them down.

What is the acceleration caused by gravity on all objects of any mass when free falling toward Earth? Choose the number with the correct unit.

• 9.8 m

• 9.8 m/s/s

• 9.8

• 9.8 m/s

Select the 2 variables that influence how strong the gravitational force of attraction (F) is between two objects:

• Velocity

• Mass

• Distance

• Time

Imagine Joy, Joel, Martina, and Alexander are astronauts on a mission to the Moon, and they discover that the moon is actually 2 times farther than any of us ever thought it was. How would you describe the gravitational force between the moon and the Earth if this was true?

• The gravitational force of attraction would stay the same

• The gravitational force of attraction would increase

• The gravitational force of attraction would decrease

Does changing the mass of a bungee jumper affect their drop distance?

• No, they will fall the same distance as a jumper with less mass.

• Yes, increasing mass increases drop distance. More mass = more GPE, so more energy can be transferred to EPE.

• Yes, increasing mass decreases the drop distance.

Think about experiment #3: Jumper Mass vs Drop Distance. What was the independent variable in this experiment?

• Mass

• Drop Distance

• EPE

In the Hooke's Law equation (F= kx), what does the k value of the bungee cord tell you about the properties of the bungee cord?

• K represents the color of the bungee cord

• K represents the elasticity of the bungee cord

• K represents the mass of the bungee cord

• K represents the length of the bungee cord

Would a mosquito flying 20 mph or an elephant running 20 mph have more momentum?

• Neither have momentum

• Both have the same momentum

• Elephant running 20 mph

• Mosquito flying 20 mph