Physics

How does gravity work like a fabric?

• Your mass pulls down on that fabric and that pulls things towards you

• The more massive something is, the more it pulls down on the fabric

• Small things cannot stretch the fabric of the Earth

• Your mass pulls things towards you, including small things like pencils

Does your mass change depending on how strong the pull of gravity is?

• Yes

• No

What? = Mass * Gravity

The more _______ a planet is, the more you will weight there

Mercury is about half the size of Earth, so you weigh less there. This means you could jump...

• twice as high

• exactly as high

• not as high

• half as high

Aly's cat has a mass of 20kg. Mars has a gravity of about 4m/s2. What is her weight on mars? (use the formula W = mg)

• 80N

• 80MG

• 8N

• 8MG

• 800MG

Benji's dog has a mass of 100kg. Earth's gravity is 10m/s2. What is his weight on Earth?

• 1,000MG

• 1000N

• 100N

• 100MG

• 100kg

Laura's cat has a weight of 15KG. Pluto has a gravity of 0.5m/s2. What is her cat;s weight?

• 7.5N

• 7N

• 70N

• 30N

True/False: The gas giants like Jupiter have more mass than Earth.

• True

• False

What is a black hole?

• A concept predicted by Einstein

• A concept predicted by Schwarzchild

• When stars die, they collapse in on themselves and their mass turns into a small point

• The singularity is all that is left of a dying star and it pulls the fabric of space down into it

• When a star goes supernova, it creates a portal to funnel all the excess energy