Recent content by trixid

What will a spring scale read for teh weight of a 58 kg woman in an elevator that moves (a) with a constant upward speed of 6.0 m's, (b) with a constant downward speed of 6.0 m/s, (c) with upward acceleration of 0.33g, (d) with downward acceleration of 0.33g, and (e) in free fall? I'm having...

Yay! Thanks a bunch.

That's what I said, right? (Just checking to make sure I've got it.)

But if it goes around 30 m in 1 second then it should go around a 62.8 m "track" at least twice, shouldn't it? No scratch that, it would go less than once, like your answer shows, because it doesn't go a whole revolution in one second. I think I'm catching on...slowly. This is sad, I'm confused...

OOPS! I was mixing up problems. I used 7.5 as r, from a different problem entirely. I got 2.28 rev/s. I'm hoping that's right.

What's the formula for circumference?

Actually, I think I'm just confusing myself. I think my answer was right...maybe?

Ah! Something is horriblely wrong with what I did. The speed has nothing to do with it.

The speed came out to be 27.6 m/s. The circumference was 47.1 m. I divided the circumference by the speed. Maybe I used the wrong numbers?

Ah I've got it now. Thanks a bunch. Does 1.71 rev/s sound about right?

A device for training astronauts and jet fighter pilots is a designed to rotate the trainee in a horizontal circle of radius 10.0 m. If the force felt by the trainee is 7.75 timers her own weight, how fast is she rotating? Express your answer in both m/s and rev/s. I got the main problem but...

A person pushes a 14.5 kg lawn mower at a constant speed with a force of 88.0 N directed along the handle, which is at an angle of 45.0 degrees to the horizontal. (a) Draw the free-body diagram showing all forces acting on the mower. Calculate (b) the horizontal retarding force on the mower...