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A uniform rod of length L and mass m is suspended by two light strings, each of length l. Find the tension in the strings by drawing the FBD for the rod first. The drawing looks like a horizontal line(ceiling) with a isosceles triangle attached, the bottom of the triangle is L(rod). The answer is 1/2mg L/sqrt( L^2-1/4L^2).
A 150 kg rock (density is 2500 kg/m 3 ) is dropped to a lake. Determine how much force the man needs to life the rock from the bottom of the lake
A catapult on a cliff launches a large round rock towards a ship on the ocean below. Calculate the speed at which the rock is launched
A ray of light strikes a thick sheet of glass (n= 1.5) At an angle of 25 degrees with the normal. Find the angle of the refracted ray within the glass
What is the magnitude of an average acceleration of the ball
Assume the ball leaves Sarah's hand a distance 1.5 meters above the ground, reaches a maximum height of 15.0 m above the ground, and takes 2.692 s to get directly over Julie's head. What is the speed of the ball when it leaves Sarah's hand? m/s 6)..
In an ultrahigh vacuum system (with typical pressures lower than 10?7 pascal), find the number of molecules in a volume of 1.70 m3
A CD has a mass of 16.5 g and a radius of 6.08 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 20.2 rad/s in 0.708 s. determine the net torque acting on it
A certain freely falling object requires 1.7s to travel the last 40m before it hits the ground. From what height above ground did it fall.
A charge q=-1.0 nC is instantaneously at a place where the electric field is 45 kN/C due east. hat are the magnitude and direction of the electron force on this charge
A 7.00 kg bowling ball collides head-on with a 2.00 kg bowlingpin, which was originally at rest. The pin flies forward with aspeed of 3.00 m/s. what was the initial speed of the ball
Hooke's law describes a certain light spring of unstretched length 33.0 cm. When one end is attached to the top of a doorframe and a 7.31 kg object is hung from the other end, the length of the spring is 42.0 cm.
A toy car is driven by a battery of 9 V. It draws a current of 2mA. What is the resistance of the toy car
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