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A skateboard track has the form of a circular arc with a 3.60m radius, extending to an angle of 90.0 degrees relative to thevertical on either side of the lowest point. A 55.0 kg skateboarderstarts from rest at the top of the circular arc. What is the normal force exerted on the skate boarder at the bottom of the circular arc?
A playground carousel is free to rotate about its center on frictionless bearings, and air resistance is negligible. What is the person's mass
You throw a bouncy ball directly down toward the ground. When it leaves your hand, 1 m above the ground, it is moving at 5 m/s. What is the ball's maximum height after it bounces
In a car collision, the driver's body must change speed from a high value to zero. This is true whether or not an airbag is used, How does it reduce injury
In an amusement park ride, cars are suspended from L = 4.22 m cables attached to rotating arms at a distance of D = 6.08 m from the axis of rotation. What is the angular speed of rotation
Find the total mechanical energy of a mass-spring system with m = 1.46kg and maximum speed 0.600m/s
this simulation can be downloaded from granthams website under ph220.simulations its file name is ball on roller cstr
A softball of mass 0.200kg that is moving with a speed of 7.0m/s collides head-on and elastically with another ball initially at rest, Calculate the mass of the target ball
A sealed cubical container 11.0 cm on a side contains three times Avogadro's number of molecules at a temperature of 24.0°C
An airplane travels 3100km at a speed of 790km/h, and then encounters a tailwind that boosts its speed to 990km/h for the next 2800 km. what was the average speed of the plane for this trip
A 102g Frisbee is 25cm in diameter and has half its mass spread uniformly in the disk and the other half concentrated in the rim. What is the Frisbee's rotational inertia
Using a twine with a density of 0.002 kg/m and a curved rod with a space of 1 m between the ends, describe how you would produce a frequency of 256 Hz using these items. (include any technical information such as forces, lengths, etc...)
Conservation of Energy A 100kg skier at the top of a 2km high mountain tucks the whole thing but only gets a final speed of 50m/s
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