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A 38 g bullet strikes a 0.65 kg block attached to a fixed horizontal spring whose spring constant is 6.2 x 103 N/m and sets it into vibration with an amplitude of 23 cm. What was the speed of the bullet before impact if the two objects move together after impact?
A 150- crate, starting from rest, is pulled across a floor with a constant horizontal force of 360 . For the first 11 the floor is frictionless, and for the next 11 the coefficient of friction is 0.31. Illustrate what is the final speed of the c..
A camera lens with index of refraction greater than 1.34 is coated with a thin transparent film of index of refraction 1.13 to eliminate by interference the reflection of light at wavelength ? that is incident perpendicularly on the lens. What multip..
A 60 kg explorer lands on Planet X, where the gravitational acceleration is 10.5 m/s2. The radius of the planet is 7.91 x 107 m. What is her weight on this planet in Newtons
You find an unlabeled box of fine needles, and want to determine how thick they are. What is the diameter of the needle
a 200 g 40.0-cm-diameter solid cylindrical turntable rotates on frictionless bearings at 60.0 rpm. a 20.0 g block sits
An asteroid is discovered to have a tiny moon that orbits it in a circular path at a distance of 103 km and with a period of 47.0 h. The asteroid is roughly spherical (unusual for such a small body) with a radius of 24.9 km.
A horizontal 792-N merry-go-round is a solid disk of radius 1.43 m, Find the kinetic energy of the disk after 2.92 s
The electric field at 0.50 m away from the center of a thin metallic spherical shell of radius 0.30 m is - 400×10^3 V/m. the charge density at the outer surface of the sphere is:
A 230g baseball is pitched at 32m/s , and it's spinning at 44 rad/s. What fraction of its kinetic energy is rotational
A projectile is fired horizontally from a gun that is 79.0 m above flat ground, emerging from the gun with a speed of 250 m/s. How long does the projectile remain in the air?
An 8 g bullet traveling at 340 m/s is shot into a 0.7 kg block of wood suspended from the ceiling by a 2.5 m long light rope. What is the speed of the block of wood just after the bullet embeds itself
A turntable has rotational inertia I and is rotating with angular speed w about a frictionless vertical axis. A wad of clay with mass m is tossed onto the turntable and sticks a distance d from the rotation axis. The clay hits horizontally with it..
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