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A skateboarder starts from the side of a circular ramp of radius r = 4 m and travels downward. He would like to have the normal force on him be five times as large as his weight at the bottom of the ramp. (a) Draw a free body diagram for the skateboarder at the bottom of the ramp. Your arrows must be the correct length. (b) How fast must he be go
Two point charges, +3.18 µC and -6.65 µC, are separated by 1.13 m. What is the electric potential midway between them
What diameter must a helium filled balloon have to float with neutral buoyancy? The mass of the empty balloon is 2.0g
A converging lens with a focal length of 7.00cm forms an image of a 3.80mm -tall real object that is to the left of the lens. Where are the object and image located
A 9 turn coil 1.80 in diameter is rotated at 11 about an axis perpendicular to a uniform magnetic field. A voltmeter connected to the coil through rotating contacts reads a peak value of 340.
An ac generator with a frequency of 1.24 kHz and an rms voltage of 24.2V is connected in series with a 2.20 kOmega resistor and a 330 mH inductor. What is the average power consumed by this circuit
suppose a random sample of 49 is selected from a population with a standard deviation of 14. if the sample mean is 125
Objects A and B are both positively charged. Both have a mass of 200g, How large is the force on A and What is the charge qA and qB
A 50lb sack of portland cement is dropped from rest onto the scale from a height h = 4ft measured from the scale's plate
A 3 kg block moves down a hill that makes a 40° angle with the horizontal direction, what is the magnitude of the acceleration of the block
An arrow is shot vertically upward and then 2.06 s later passes the top of a tree 41.3 m high. How much longer will the arrow travel upward
A steel ball (density = 7860kg/m^3) with a diameter of 6.8 cm is tied to an aluminum wire 88 cm long and 2.0 mm in diameter. Find the amount of stretch in the wire at the top of the circle
What minimum coefficient of static friction is required? Is the reply you found reasonable? In other words, is he probable to stay on the merry-go-round.
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