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A basketball of mass 0.643 kg is passed to a player of mass 90.0 kg who jumps off the floor while catching the ball. The player's center of mass is instantaneously at rest just before he catches the ball, which is initially moving at a velocity of 10.5m/s, directed 30.0° below the horizontal. Find the horizontal component of the center of mass velocity of the system of player and ball just after the catch.
A man pulls a 50.0 kg box at constant speed across the floor. What is the value of the normal force
a runoff for a truck consists of aa 500 meter horizontal runway with course gravel to stop the truck. the mass of the
Four identical charges (+3.0 µC each)are brought from infinity and fixed to a straight line. Determine the electric potential energy of this group
A particularly beautiful note reaching your ear from a rare Stradivarius violin has a wavelength of 39.1 cm. The room is slightly warm, so the speed of sound is 344 m/s. Part A If the string's linear density is 0.560g/m and the tension is 160N , how ..
An electron gun inside a computer monitor sends an electron toward the screen at a speed of 1.20 × 108 m/s. what is the magnitude of its relativistic momentum
An object of 30 kg mass is pulled with a force 1.2 * 10^2 N at angle ?=30 degree over the distance 5 meter.If the coefficient of friction is 0.2, what is workdone by the force of friction
Car headlights use concave mirrors. There's a concave mirror in the back of the headlight socket, and the actual light bulb is placed somewhere along the principal axis. :
A basketball player can jump vertically 0.9 m. Assume that the jump interval (from lowering the body to his feet taking off) lasts for 0.3 s and the mass of the player is 90 kg. Ignore air resistance. Determine the force that the the player exerts..
The emperical formula of an organic compound was found to be C3H7. find the molecular weight and molecular formula of the compound
A potential difference of 80 mV exists between the inner and outer surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the cell?
Two equally charged insulating balls each weigh 0.46 g and hang from a common point with identical threads 50 cm long. The balls repel each other therefore that the separation between their centers is 6.2 cm. What is the magnitude of the charge on ea..
A converging lens has focal length 10 cm. How far from the lens should the object be placed to form a virtual, upright image twice as large as the object
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