Recent content by O0ZeRo00

The Moon's mass is 7.34x10^22 kg, and it is 3.8x10^8 m away from Earth. Earth's mass is 5.97x10^24 kg. (a) Calculate the gravitational force of attraction between Earth and the Moon. I already did that. It's 2.01e+20. (b) Find Earth's gravitational field at the Moon. This is the part I'm...

Ahh! Nevermind. Typo. Mine actually was 261.79. My bad. Ha.

Hmm... That's odd because mine comes out right too.

Well, I know it's correct because I submit my answers onto a website that checks to see if it's right or not.

Okay. I've solved it. It was 271.79 Km/h at 8.54 degrees east of north. Thanks for your help. :]

Yes, I have. Which is where I got the idea for the Law of Cosines.

An airplane flies due north at 220 km/h relative to the air. There is a wind blowing at 55 km/h to the northeast relative to the ground. What are the plane's speed and direction relative to the ground? I started by using the law of Cosines. a^2 = b^2 + c^2 - 2bccos(a) That's the only thing...

Yeah, the book has examples but, not for the problems like that one. I feel like the question doesn't give me enough information.

A pitched ball is hit by a batter at a 40° angle and just clears the outfield fence, 96 m away. If the fence is at the same height as the pitch, find the velocity of the ball when it left the bat. Ignore air resistance. Velocity at 40°? Honestly I don't know how to do this. I have a whole...