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The 1994 Winter Olympics included the aerials in skiing. In this event skiers speed down a ramp that sloped sharply at the end. The sharp upward slope launches then into the air, where they perform acrobatic maneuvers. In the women's competition, the end of a typical ramp is directed 63o above the horizontal. With this angle, a skier attains a height of 13 meter above the end of the ramp. Evaluate what is the skier launch speed?
A bomb explodes into three identical pieces. One flies in the + y-direction at 12.5 m/s , a second in the - x-direction at 15.4 m/s. What's the direction of the velocity of the third piece
A woman weighs 800 N on earth. When she walks on the moon, she weighs only 133 N. What is the acceleration due to gravity on the moon
a 18000 n automobile travels at a speed of 43 kmh northward along a street and a 7000 n sports car travels at a speed
A bat crashes into the vertical front of an accelerating subway train. If the coefficient of friction between the bat and the trainis 0.86, what is the minimum acceleration of the train that willallow the bat to remain in place?
Two blocks are connected on a horizontal frictionless table and pulled to the right with a force F= 60 N. compute the tension in the string connecting the two blocks
An 3kg body is fastened to a weightless rod 3meters long to form apendulum. What is the increase in the potential energy of the body
im looking at a 12th magnitude bright star. i find an average of 11 speckles of light in each 10ms image.assuming that
As a bar magnet moves toward a 150-turn coil, the magnetic field (which is perpendicular to the plane of the coil) changes from 0.25 T to 0.53 T in 0.3 s. what is the magnitude of the induced current in the coil
A flat sheet of crown glass has a thickness of 1.4 cm. It is on top of a flat sheet of crystalline quartz that has a thickness of 1.3 cm. Light strikes the crown glass vertically and travels through it and then during the crystalline quartz. In the t..
A 64-kg man standing on a scale in an elevator notes that the elevator rises, the scale reads 827 N. What is the acceleration of the elevator
Roughly 3.97 % of what you exhale is carbon dioxide. Assume that 22.4 L is the volume of 1 mole (6.02·1023 molecules) of carbon dioxide and that you exhale 0.539 L per breath. how many kilograms of carbon dioxide do you exhale in a year
As you drive by an AM radio station, you notice a sign saying that its antenna is 49 m high. what is the frequency of the station
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