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1. a football can be kicked into the air with a max speed of 18 m/s.
a)what is the farthest horizontonal distance the ball can be kicked
b) how long will the ball be in the air (there is no wind)
2. a 0.60kg mass on a 1.5m string is swung in a verticle circle so that hte tension in the string is zero when the stone is at the top of the circle.
a) find the speed of the stone
b) if the rope can withstand a max. tension of 13N before snapping, will the string break when the stone is at the bottom of the circle? Explain how you know.
3.two boxes with masses of 3 kg and 5kg are connected by a light rigid rope and a force of 6n is to the 5kg mass to pull it forward. if the coeffectent of friction between the ground and boxes is 0.24, find hte accleeration of the boxes and the tenstion in the string connecting the two boxes.
Last edited by physicsE=MC^2 (2008-09-21 00:05:56)
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I'll take a shot at these questions, but I'm certainly not an authority on physics.
1.
a) v = (d/t); d = tv; since no time variable is given the ball can be kicked an infinite distance......
b) t = (d/v); since no distance variable is given, the ball can be in the air for eternity!?
2.
a)
m = 0.60kg
r = 1.5m (?)
T = Fg (?)
v = Sqrt(r*g)
v = 3.8 m/s
b) No, because T(applied force) is = to Fg (?)
3.
I don't have the time. Maybe I'll help later.
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