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A projectile is launched at an elevation angle of 60o with an initial velocity of 120 m/s. Determine what is the x and y component of its velocity when it reaches a height which is 1/3 its maximum height above its launch point? Compute what angle above the horizontal is the velocity vector at this point?
In a slap shot a hockey player accelerates the puck from a velocity of 5.00 m/s to 30.0 m/s in the same direction. calculate the distance over which the acceleration acts
A charge of -6 nC is at the origin and a second charge of 11.0 nC is at x = 5.0m. Find the magnitude and direction of an electric field halfway in between the two charges.
Unpolarized light of intensity I0 is incident on three polarizing filters. What light intensity emerges from the third filter
A horizontal block-spring system with the block on a frictionless surface has total mechanical energy E = 55.3 J and a maximum displacement from equilibrium of 0.213 m. (a) What is the spring constant? N/m (b) What is the kinetic energy of the sys..
How much time does the object take to reach the ground.
(a) If the elevator moves with an upward acceleration a with arrow of magnitude 2.0 m/s2, find the tensions T1 and T2 in the upper and lower strings. T1 = N T2 = N
A 24.0V battery is in series with a switch, a 0.30Hinductor, and a 24? resistor. Find the potential differences across the inductor at t=3
A uniform metal rod, with a mass of2.9kg and a length of0.9m, is attached to a wall by a hinge at its base. Find the horizontal component of the force exerted on the rod by the hinge
A 984-kg satellite orbits the Earth at a constant altitude of 106-km. What is the change in the system's potential energy
a cicuit with a 112.0 m aluminum wire, with a diameter of 0.182 mm, what is the potential difference applied to the circuit after the wire is cooled
A light ray is incident on the surface of water (n= 1.33) at an angle of 60° relative to the normal to the surface. The angle of the refracted wave is
Speedboat A negotiates a curve whose radius is 124m. Speedboat B negotiates a curve whose radius is 230m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
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