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A 41.2-kg boy, riding a 2.65-kgskateboard at a velocity of +5.27 m/s across a level sidewalk,jumps forward to leap over a wall. Just after leaving contact withthe board, the boy's velocity relative to the sidewalk is 5.52m/s, 8.64° abovethe horizontal. Ignore any friction between the skateboard and the sidewalk. What is the skateboard's A 41.2-kg boy, riding a 2.65-kg skateboard at a velocityof +5.27 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with theboard, the boy's velocity relative to the sidewalkis 5.52 m/s, 8.64° above the horizontal. Ignore anyfriction between the skateboard and the sidewalk. What is the skateboard's velocity relative to the sidewalk at this instant? Besure to include the correct algebraic sign with your answer.? (Besure to include the correct algebraic sign with youranswer.)
an electron has an initial velocity with an x component of zero a y component of 10.4 kms a z component 13.4 kms and a
A state trooper chases a speeder along a straight stretch of road; both vehicles move at 136 km/h. The siren on the tropper's vehicle produces a sound of 490 Hz. What frequency is heard by speeder? (Take the speed of sound in air to be 343 m/s.)
You are driving along a highway at 35.0 m/s when you hear the siren of a police car approaching you from behind, What is the speed of the police car
a rubber ball falls on a floor from a height of 19.6 m. calculate the velocity with which it strikes the ground. to
Find the moment of inertia of a solid cone of mass M about its vertical symmetry axis. The cone has a height "h" and a base diameter "b". (If you can please explain in detail I would be very grateful, its late at night here and my mind is running a l..
A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the 30.0° angle.
what is the definition of the joule in terms of the basic si
A 4.00-kg particle moves along the x axis. Its position varies with time according to x = 3.0t + 2.0t^2 where x is in meters and t is in seconds. Find the acceleration of the particle
An ideal, monatomic gas is allowed to expand quasi-statically and adiabatically from an initial volume Vi = 4.1 liter and initial temperature Ti = 390 K to a final volume of Vf = 9.2 liter. Calculate the heat added to the system in this isothermal ..
An 16--long bicycle crank arm, with a pedal at one end, is attached to a 23--diameter sprocket, the toothed disk around which the chain moves. A cyclist riding this bike increases her pedaling rate from 65 to 95 in 12 . What length of chain passes ov..
Mike pulls a sled across level snow with force of 235 N along a rope that is 35.5° above the horizontal. If the sled moved the distance of 75.0 m, how much work did Mike do.
A rocket traveling 1850 m/s away from the Earth at an altitude of 6800 km fires its rockets, at what rate must the gases be ejected
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