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A racetrack has the shape of an inverted cone. On this surface the cars race in circles that are parallel to the ground, and the surface is at an angle 21°. For a speed of30m/s, at what value of the distancedshould a driver locate his car if he wishes to stay on a circular path?
The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between mass 1 and teh ramp is 0.25. Evaluate the change in kinetic energy of the 50 kg block as it moves from a to b, a distance of 20 m
A horizontal block and spring system with negligible friction is initially in equilibrium. The mass of the block is 0.160 kg. Theblock is pulled to one side so that its initial displacement is0.150 m.
The lob in tennis is an effective tatic when your opponent is near the net. It consists of lofting the ball over his head, forcing him to move quickly away from the net. With what minimum average speed must he move
What must the charge (sign and magnitude) of a 1.43 g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 630.
Calculate velocity of electron in first Bohr orbit of hydrogen atom (Given r = a0). Find de-Broglie wavelength of the electron in first Bohr orbit
An incredibly large slingshot is stretched 1.0 meters to launch a 128.0-gram projectile with a speed sufficient to escape from the Earth (11.2 km/s). What is the spring constant of the device if all the potential energy is converted to kinetic ener..
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 443 Hz when the train is approaching him.
A bicycle has wheels with a diameter (DIAMETER, not radius) of 0.580 m. Find the linear acceleration of the bicycle
A coil of length l=50 cm and diameter d= 5 cm consists of N= 200 turns. there is a current I= 1 A running thru the coil. Determine: a) the inductance of coil; b) the magnetic flux flowing thru a cross sectional area of the coil.
You have a ball on a wire that is twirled in a circular orbit with a radius of 3.7 m, What is the speed of the ball in orbit
A ray of light is incident on the surface of a block of clear ice at an angle of 34.0° with the normal, Find the angle between the reflected and refracted light.
A long straight cylindrical wire conductor of radius R carries a current I of uniform current density in the conductor. Find the magnetic field outside the wire
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