Homework Statement
In a ride called Drop Out, riders are spun in horizontal circles of radius 5.5m, which forces them to the outer wall. When they are spinning fast enough, the floor drops out, and they are suspended by friction. The coefficient of static friction is 0.28, how many rev/s must...
Homework Statement
An airplane makes a belly landing at 80km/h (I've converted to 22.22222m/s), the coefficient of kinetic friction between it and the runway is 0.60. How far does the airplane slide on the runway?Homework Equations
acceleration = [sine(x) - (Uk)(cos(x))] x gravity (I used this...
Alright so for the first part of the question, I get a new and improved answer of 1852m/s, which is much more reasonable.
Now for the second part, I'm thinking I should make a quadratic function out of this...would I use 1/2(a)(t)^2 for this? Or...is there an easier way to solve it?
Acceleration = -9.8m/s/s
Displacement = 175 000 metres
Initial Velocity = Unknown
Time = Unknown
End Velocity = 0 (assuming it comes back down and lands?)
So to find Vi, I would do: Vf^2 = Vi + 2ad
0^2 = Vi^2 + 2(-9.8)(175,000)
Correct?
If an 81.00kg projectile is fired STRAIGHT up, with no air resistance, under the effects of gravity, and it reaches an altitude of 175km (175,000 metres), what was it's initial speed (what speed was it fired upwards at)?
I disregarded the objects mass and calculated 1,715,000 m/s...would these...