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In preparation for a demonstration on conservation of energy, a professor attaches a 7.2-kg bowling ball to a 2.9-m-long rope. He pulls the ball 19° away from the vertical and holds the ball while he discusses the physics principles involved. Assume that the force he exerts on the ball is entirely in the horizontal direction. Find the tension in the rope.
Find the force the professor is exerting on the ball.
An air-track glider attached to a spring oscillates between the 8.00 mark and the 69.0 mark on the track. The glider completes 10.0 oscillations in 40.0. What is the maximum speed of the glider
A cylindrical copper cable carries a current of 1290 A. There is a potential difference of 1.60 10-2 V, What is the radius of the cable
Two identical capacitors are connected in parallel to an ac generator that has a frequency of 574 Hz and produces a voltage of 24 V. What is the capacitance of each capacitor
Phobos is a moon of mars with a diameter of 22.5 km and a mass of 1.08 x 10^16 kg. It is located at a distance of 9,377 Km from Mars. what is the center of mass for the Mars-Phobos System
You come across an open container which is filled with two liquids. Since the two liquids have different density there is a distinct separation between them. what is the density of the unknown fluid
A 1.7m -long barbell has a 21kg weight on its left end and a 32kg weight on its right end. What is the torque due to gravity about the left end of the bar
A basketball player is balancing a spinning basketball on the tip of his finger. The angular displacement of the ball, in radians is
Compute the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.10 m above the ground.
A helicopter is ascending vertically with the speed of 5.79. At a height of 127 above the Earth, a package is dropped from a window. How long take the package to hit the ground.
A pion decays into a muon and a neeutrino. In the rest frame of the pion, the muon always has a speed of .507c. what will be the speed of the muons in the lab fram
What is the centripetal acceleration of a helicopter flying in a horizontal circle of a diameter 510 m at a speed of 120 m/s
what is a catapult ? what is the traditional use of a catapult ? when were catapults in greatest use ? what
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