Universal Swing
Universal Swing
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CAP UNIVERSAL SWING SHAFT (2PC S) Sale Price: $59.99  |
DescriptionCAP UNIVERSAL SWING SHAFT (2PC S) |
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physics problem...please help!!!?
1.a car travels at a constant speed of 30.0 mi/h on a level circular turn of radius 50.0 m. what is the minimum coefficient of static friction between the tires and roadway so that the car makes the circular turn without sliding?
2. a. let mp be the mass of a planet, and rp be the radius of that planet. Let m be the mass of any object at the surface of that planet. derive a formula for the acceleration due to gravity using the law of universal gravitation and the fact taht w=mg. b. calculate the gravitational acceleration on the surface of mars. c. the weight of a 0.50 kg rock on its surface. 9equatorial radius=3,397.2 km, mass=6.42x10 raised to 23 kg.
3. what centripetal force is exerted by the rope on a 1.2 kg tether ball swung in a 2.0 m diameter circle at 45 revolutions per minute.
i need also the solutions... thanks!!!
1.
v = 30mi/h = 13.4m/s, r = 50.0m
frictionforce=centripetalforce
umg = mv²/r
so
u = v²/(gr) = plugnchug
2.
W = G(mp)m/(rp)² = mg
so
g = G(mp)/(rp)²
3.
m = 1.2kg, f = 45 /s, r = 2m
then
F = mw²r = m(2πf)²r = plugnchug
.,,.,..