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A baseball thrown at a angle of 40.0 degrees above the horizontal at 15.0 m/s from the top of a vertical cliff strikes the ground 42.5 m from the base of the cliff. Ignore air resistance. Find the height of the cliff.
Compare the gravitational lens to the one found in a telescope.
As part of a safety investigation, two 1800 cars travelling at 18 are crashed into different barriers. Find an average forces exerted on (a) car that hits a line of water barrels and takes 1.80 to stop, and (b) car that hits a concrete barrier and ta..
The average value of the squared speed does not equal the square of the average speed. find the average value of the squared speed
A ball of mass M and radius R starts from rest at a height of h = 1.73 m and rolls down a ? = 25.8° slope, What is the linear speed of the ball when it leaves the incline
You have a 2.01-m-long stretched string with a mass of 19.5 g. When you oscillate the string at 440 Hz, Calculate the tension in the string
a physics professor demonstrates the doppler effect by tying a 600hz sound generator to a 1.0-m-long rop, what are the highest and lowest frequencies heard by a student in the classs room
A block of mass m = 2 kg and initial velocity v = 5 m/s runs into and compresses a spring of spring constant k = 50 N/m. How long is the block in contact with the spring
An astronomical telescope is designed with an overall magnification of 80x. The objective has a focal length of 98.0 cm. How far should the eyepiece be from the objective
A disc has a radius of 2.20 cm and a mass of 27.0 grams and is initially at rest. Starting at time t=0, two forces are applied tangentially to the rim as indicated, calc the moment of inertia of the uniform disc
A tetherball leans against the smooth, frictionless post to which it is attached. The string is attached to the center of the ball. If the string is L = 1.20m long and the ball has a radius of r = 0.150m with mass m = 0.250kg
A 100g ball on a 50 cm long string is swung in a vertical circle about a point 200 cm above the floor. obtain the tension in the string an instant before it broke
When the lights of a car are switched on, an ammeter in series with them reads 7.52 A and a voltmeter connected across them reads 12.0 V, find the current through the starting motor
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