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Physics

5 likes 1.7
(Very easy)

Two missiles head directly toward each other, one at 1200 mph, the other at 1800 mph. I...

Added about 1 year ago by Valentin currently with 20 comments

7 likes 4.0
(Moderate)

You’re sitting in a stationary car. There’s a helium balloon tied to its floor (see pic...

Added 11 months ago by ace currently with 37 comments

4 likes 5.3
(Moderate)

Two ferryboats start at the same instant from opposite sides of a river traveling acros...

Added about 1 year ago by Valentin currently with 35 comments

20 likes 5.5
(Moderate)

A man is in a rowing boat floating on a lake, in the boat he has a brick. He throws the...

Added about 1 year ago by jaX currently with 34 comments