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A 39.2-kg boy, riding a 2.67-kg skateboard at a velocity of +5.37 m/s across alevel sidewalk, jumps forward to leap over a wall. Just afterleaving contact with the board, the boy's velocity relative to the sidewalk is 5.52 m/s, 9.72° 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.
a vertical scale on a spring balance reads from 0 to 190 . the scale has a length of 14.0 from the 0 to 190 reading. a
A 36.0 g bullet moving at 478 m/s strikes a 3.7 kg bag of flour that is on ice, at rest. The bullet passes during the bag, leaving at 255 m/s. How fast is the bag moving when the bullet exits.
a explain the function of the activator added in trace quantities to many inorganic scintillators. why are activators
It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.175 s, elucidate what is the average force exerted on the ball by the wall?
find the magnitude of her centripetal acceleration. A small box is held in place against a rough vertical wall by someone pushing on it with the force directed upward at 27{rm ^circ} above the horizontal.
A 22.0 kg child slides down a slide that makes a 37.0° angle with the horizontal. At what angle from the horizontal is this force directed
A 5100 kg iceberg with density 931 kg/m3 is afloat in seawater with density 1030 kg/m3, Find the buoyant force on the iceberg
A person takes in a breath of -2 degrees C air and holds it until it warms to 37.5 degrees C. Determine the work done by the air on the lungs
two conductors having net charges of 16.0 microc and -16.0 microc have a potential difference of 16.0 v between them. a
A Football is kicked at 45degrees and travels 82m before hittingthe ground. What is its initial velocity? How long is it in the air?
question1if argentinosaurus a long-necked gigantic sauropod had a head height of 19 m and a heart height of 7.9 m what
A thin, uniform, metal bar, 3m long and weighing80N , is hanging vertically from the ceiling by a frictionless pivot, Find the angular speed of the bar just after the collision
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