Saturday
May 25, 2013

Posts by Kia

Total # Posts: 87

physics
why isnt acceleration = 9.81m/s^2 due to gravitational force?

physics
You stand on the seat of a chair and then hop off. During the time you are in flight down to the floor, the Earth is lurching up toward you with an acceleration a. If your mass is 52 kg, what is the value of a? Visualize the Earth as a perfectly solid object.

physics
A landscape architect is planning an artificial waterfall in a city park. Water flowing at 1.40 m/s will leave the end of a horizontal channel at the top of a vertical wall 3.90 m high, and from there the water falls into a pool. To sell her plan to the city council, the archi...

physics
A boy can throw a ball a maximum horizontal distance of R on a level field. How far can he throw the same ball vertically upward? Assume that his muscles give the ball the same speed in each case. (Use R and g as appropriate in your equation.)

physics
One strategy in a snowball fight is to throw a snowball at a high angle over level ground. While your opponent is watching the first one, a second snowball is thrown at a low angle timed to arrive before or at the same time as the first one. Assume both snowballs are thrown wi...

physics
A boy can throw a ball a maximum horizontal distance of R on a level field. How far can he throw the same ball vertically upward? Assume that his muscles give the ball the same speed in each case. (Use R and g as appropriate in your equation.)

physics
What i have with me is vi*sin(theta) - (g*sqrt(2*h/g)) however it is not correct.

phy
As their booster rockets separate, Space Shuttle astronauts typically feel accelerations up to 3g, where g = 9.80 m/s2. In their training, astronauts ride in a device where they experience such an acceleration as a centripetal acceleration. Specifically, the astronaut is faste...

physics
As their booster rockets separate, Space Shuttle astronauts typically feel accelerations up to 3g, where g = 9.80 m/s2. In their training, astronauts ride in a device where they experience such an acceleration as a centripetal acceleration. Specifically, the astronaut is faste...

physics
the reference frames are 1) the car, 2) the earth. I've got 3.54 m/s for part (1). but it is not correct. Thanks a million

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