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A pendulum consists of a sphere of mass 1.8 kg attached to a light cord of length 10.5 m as in the figure below. The sphere is released from rest when the cord makes a 43.6? angle with the vertical, and the pivot at P is frictionless. The acceleration of gravity is 9.8 m/s2. Find the speed of the sphere when it is at the lowest point. What is the tension of the cord at the lowest point? Answer in units of N
A rock is lauched from the moon and travels away from it at a speed of 2/5, Call the event of the rocket's lauching event A, Draw a spacetime diagram of the situation, drawing and labeling the worldlines of the moon
A battery charger is connected to a dead battery and delivers a current of 3.7 A for 2.1 hours, How much energy is delivered to the battery
A handheld digital multimeter (DMM) is used to measure the portential difference accross the first resistor by placing probe leads at each end of this resistor.
If the surface area of a human is 1.7 m^2 and each square inch of skin contains 75 pressure sensors
at time t = 0 s, a puck is sliding on a horizontal table with a velocity 3.60 m/s, 35.0* above the + axis. What is the velocity of the puck at time t = 1.50 s
A pendulum is made out of a ( 251.3+-0.1)g mass and a string that is (1.3+-0.005)m long. If the mass has a speed of (1.3+-0.1)m/s, Calculate the tension of the string and its uncertainty
A 500kg helicopter ascends from the ground with an acceleration of 2.00m/s^2 over a 5.00second interval, what is the work done by the gravitational force
A baseball (m = 138 g) approaches a bat horizontally at a speed of 38.6 m/s (86 mi/h) and is hit straight back at a speed of 45.5 m/s (102 mi/h). what is the average force exerted on the ball by the bat
A uniform electric field of magnitude 256 V/m is directed in the negative y direction. A +12.9 uC charge moves from the origin to the point (x, y) = (20.0cm, 45.6 cm). What was the change in the potential energy of this charge? Through what potent..
Nichrome wire is used in some radiative heaters. What power will it draw when first switched on
A person who weighs 680 N is riding a 98-N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires. If the gauge pressure in each tire is 6.45 105 Pa, what is the area of contact between each tire and the ..
two buses started from the same depot at the same time and traveled in opposite directions. after traveling 4 hours
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