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A ball is thrown up onto a roof, landing 4.15 s later at height h = 16.0 m above the release level. The ball's path just before landing is angled at 60.0° with the roof. (Let the positive x direction be to the right, and the positive y direction be upward.)
a) Find the horizontal distance d it travels.
b) What is the magnitude of the ball's initial velocity?
c) What is the angle (relative to the horizontal) of the ball's initial velocity?
An initially stationary box of sand is to be pulled across a floor by means of a cable in which the tension should not exceed 754 N. what is the weight of the sand and box in that situation
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consider three identical metal spheres a b and c. sphere a carries a charge of 4q. sphere b carries a charge of -7q.
A 5.00-g bullet, traveling horizontally with a velocity of magnitude 360 m/s, is fired into a wooden block with mass 0.800 kg, initially at rest on a level surface. What is the decrease in kinetic energy of the bullet
A 94.07 cm-long steel string with a linear density of 1.02 g/m is under 273.01 N tension. find the wavelength of the sound wave that reaches your ear
What is the tension T2 in the left-hand cable slanted at an angle of θ2 with respect to the wall? Illustrate what is the angle θ2 which the left-hand cable makes with respect to the ceiling?
a particle moves along a straight line path in such a way that its acceleration at any time is given by vt sint12. if
A box starts out at the top of a frictionless ramp, then slides down. The ramp has a heighth=3meters and a slope of5degrees with respect to the ground. What is the initial gravitational energy of the box at the top of the ramp
A diver makes 2.5 revolutions on the way from a 9.0-m-high platform to the water. find the diver's average angular velocity during a dive
A 39.6-kg boy, riding a 2.33-kg skateboard at a velocity of +5.07 m/s across a level sidewalk, find the skateboard's velocity relative to the sidewalk at this instant
A steel section of the Alaskan pipeline had a length of 67.6 m and a temperature of 16.1?C when it was installed. What is its change in length
A proton a neutron and an alfa particle accelerated through the same potential difference enter a region of uniform magnetic field moving at right angles to B.(a) Compare their kinetic energies.(b) if the radius of the proton’s circular path is 10 cm..
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