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Two boys are sliding toward each other on a frictionless, ice covered skating rink. Jack, having mass 45.0 kg is gliding to the right at 8.00 m/s, and Ethan, mass 31.0 kg, is gliding to the left at 11.0 m/s along the same direction. When they collide nearly head-on, they grab each other and hang on.
(a) What is their translational velocity immediately thereafter?
(b) What fraction of their original kinetic energy is still mechanical energy after their collision?
(c) The boys decide to repeat the collision with the same original velocities, but this time moving along parallel lines 1.20 m apart. At closest approach, they lock arms and start rotating about their common center of mass. Given their masses, use the equation for the centre of mass to calculate where the centre of mass is for the two boys
(d) Model the boys as point particles and their arms as a massless cord that does not stretch. Find their angular speed about the centre of mass.
The slidey skull. The slidey skull consists of a 4.8 kilogram skull attached to a 75 N/m spring that slides back and forth on 34o incline. obtain how far up the incline will the skull slide
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7 an x-ray tube is operating with energy of 16 keV the produced x-rays photon strike a target and are compton-scattered at an angle of 45 degrees, what is the energy of the scattered x-ray photon in ev
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Rumor has it that a photographic camera on a spy satellite can read the license plate of an automobile on the ground. what must be the diameter of the aperture of the camera
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determine the force in members cd and gf of the truss and state if the members are in tension or compression. also
The magnetic flux through a 28 ohm loop varies with time according to phi(t) = 4t^2+ 120 e^-0.3t, where phi is measured in Webers. Determine the current (in mA) induced in the loop at time t = 2s.
A uniform ladder 5.0 meter long rests against a frictionless, vertical wall with its lower end 3.0 meter from the wall. The ladder weighs 160 Newton. Find how far along the ladder can the man climb before the ladder starts to slip
question you are driving into st. louis missouri and in the distance you see the famous gateway-to-the-west arch. this
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