Gravity and Motion

Poll

If you drop a basketball (about 0.6 kg) and a heavy medicine ball (5 kg) from the same height, just above your head, which would hit the ground first?

• The Basketball

• The Medicine Ball

• The Same Time

• The result is random

Poll

Was your prediction about the basketball and medicine ball correct?

• Yes

• No

• Maybe

Poll

When a ball is dropped and falls from just above someone's head...

• The ball moves at constant speed as it falls.

• The ball speeds up as it falls.

• The ball slows down as it falls.

Poll

How does the gravitational force on the medicine ball compare to the gravitational force on the basketball?

• There is more gravitational force on the medicine ball.

• The gravitational force is the same.

• There is more gravitational force on the basketball.

Poll

How did you do on those last two questions?

• I got both right.

• I got one right.

• I got both wrong.

Poll

Do you think it's easy to see acceleration?

• Yes

• No

• Maybe

Poll

If you drop a penny from the top of the Empire State Building and it hit someone on the head, the result would be...

• They would barely feel it.

• It would hurt, but not be lethal.

• It would most likely be lethal.

Poll

How was your prediction for the lethality of the penny?

• I knew it!

• I guess right

• I didn't know and guessed wrong.

• I thought I know, but I was wrong.

Multiple Choice

Why wasn't the penny lethal when dropped from that height?

• It's so light that it doesn't have enough of an impact.

• Air friction keeps it from falling too fast.

• It spins to fast that it acts like a helicopter.

Poll

How fun does indoor skydiving look?

• Super fun!

• It's okay

• Not for me.

Poll

A stack of balls is dropped. What do you think will happen?

• They bounce together, with the same motion for each bounce.

• The balls scatter in every direction.

• The top ball goes way higher than the drop height.

Poll

How will the slinky drop?

• The bottom end will fall first.

• The top end will fall first.

• Both ends will fall together.

• The ends will collapse in the middle.

Poll

How was your prediction for the slinky drop?

• Nailed it!

• I was wrong.

• I'm still confused.

Multiple Choice

How did the slinky drop?

• The bottom end will fall first.

• The top end will fall first.

• Both ends will fall together.

• The ends will collapse in the middle.

Poll

Is there gravity in space?

• Yes.

• Maybe.

• No.

• Yes, but only a little bit.

Poll

Can you "feel" zero g's in a plane?

• Yes.

• No.

• Maybe.

Poll

Which description of gravity would you use?

• Gravity is a downwards force.

• Gravity is an attraction towards larger objects.

• Gravity is the attraction of masss to all other mass.

Poll

Are mass and weight the same thing?

• Yes

• No

• Maybe

Multiple Choice

If something has a lot of inertia, then it is...

• hard to get moving and hard to stop

• always very heavy

• always moving fast

• completely unstoppable

Multiple Choice

When you put an unbalanced force on an object, it always...

• Stays the same speed.

• Accelerates

• Rotates

• Slows down.

Poll

Does the Moon pull on the Earth?

• Yes.

• No.

• Maybe.

Multiple Choice

How does the size of the pull of the Earth on the Moon compare to the size of pull of the Moon on the Earth?

• The Earth has a greater pull.

• The Moon has a greater pull.

• It depends on the position.

• The two pulls are the same size.