Friction, Velocity, and Speed questions....? help!? - bicycle swing woman
A woman on a bicycle traveling at 10 m / s stops on a flat road connect pedals, while catching a steep hill at 3.0 ° horizontally. If frictional forces are ignored, traveling as far up the hill before stopping for?
a. 30 m
b. 10 m
c. 97 m
d. The answer depends on the mass of women.
e. 5.1 m
A bullet fired at 100 m / s horizontally in a block of 2 kg with a light rope length of 1.2 m. When exposed to the block system, and swing ball vertically up to 20 degrees, the mass of the ball:
a. 24 g
b. 28 g
c. 123 g
d. 15 g
e. 79 g
A mass m is launched cm from a height of 75 from the right side of the road to life, the right side of the figure. Simply drag acting on the mass along the hoticipate in the horizontal part of 30 cm in the medium term on both sides of the O with a coefficient of kinetic friction of 0.4. Determine how high the second time in this case on the left side, and in which direction it moves when it stops?
Friday, February 19, 2010
Bicycle Swing Woman Friction, Velocity, And Speed Questions....? Help!?
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3 comments:
1. Uf = Ui
mgh = 0.5 mv ^ 2
2, you must have a formula for it. If not, protection, use of momentum and conservation of mechanical energy to find the formula.
3. N-graph.
Mgh = 1/2m * v ^ 2
h = 1/2V ^ 2 / g
h = 5.1 m
Hill dist (d) = 5.1/sin3
d = 97.44m (C is correct)
D. - The gravity is the only thing that work on so that its mass is needed to determine how far they gone.
I have a calculator handy for youre youre the last two:-D
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