Recent content by lindsey0307

Yes, I've figured it out now, thanks!

Homework Statement A ball of mass 0.23 kg is attached securely to a string, then whirled at a constant speed in a vertical radius of 0.75 m. Calculate the minimum speed of the ball at the top of the path if it is to follow a complete circle. Homework Equations F = mv(squared)/R The...

Now I've got the answer! I just subtracted the radius of Earth from my answer in a). Ah, i should've realized that...thank you!

Oh, I just realized I do have the radius of Earth on my formula sheet (which we've never needed to use before). It says it is 6.28x10 (to the power of 6) m.

Homework Statement A space vehicle of mass 555kg, experiences a gravitational pull from Earth of 255N. The mass of Earth is 5.98x10 (to the power of 24) kg.How far is the vehicle a) from the center of the Earth, and b) above the surface of the Earth? Homework Equations FG = GM1M2/d squaredThe...

For maximum hang time & distance (with no air resistance) a projectile should be launched at an angle of 45°. However, when air resistance is present, how does this affect the angle at which the projectile is launched at (to achieve maximum hang time and distance)? I would think that the...