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A catcher catches a 145{\rm g} baseball traveling horizontally at 32.0{\rm m}/{\rm s}. How large an impulse does the ball give to the catcher? If it takes the ball 22.0{\rm ms} to stop once it is in contact with the catcher's glove, what average force did the ball exert on the catcher?
There is a uniform charge distribution of ? = 8.12 10-8 C/m along a thin wire of length L = 5.94 cm. The wire is then curved into a semicircle that is centered about the origin, so the radius of the semicircle is R = L/?. Find the magnitude of the el..
Starting from rest, a 98-kg firefighter slides down a fire pole. How far did he slide down the pole
A student sits on a rotating stool holding two 3.6-kg objects. When his arms are extended horizontally, Find the new angular speed of the student
A certain LCD projector contains a single thin lens. An object 31.7 mm high is to be projected so that its upright image ?lls a screen 2.8 m high. The object-to-screen distance is 1.33 m. Find the focal length of the projection lens. Answer in units ..
Two rays leave a point source and strike a front-silvered mirror, making angles with the normal of 30.0° and 52.5°, respectively. What is the angle between the two reflected rays
A spherical conductor with radius 2.00 cm is centered on the origin and holds charge q1=-250 nC, Find the surface charge density a(charge per area) on the outside surface of the outer spherical shell
Two spheres with uniform surface charge denisty, first with radius 7.4 cm and the other witrh radius 5.0cm, What is the surface charge density on each sphere
Evaluate the magnitude of N at the lowest point? If the wheel's speed is doubled, what is the magnitude FN at the highest and lowest point?
A 7.05 bullet traveling at 520 m/s embeds itself in a 1.85kg wooden block at rest on a frictionless surface. Find the amplitude of the subsequent simple harmonic motion
A roller-coaster car moves 177 ft horizontally and then rises 139 ft at an angle of 30° above the horizontal. It then travels 139 ft at an angle of 40° downward. What is its displacement from its starting point? Use graphical techniques.
A patient walks across a force platform and the forces exerted by the patients foot during a step is recorded. What is the direction of the resultant force
An ideal gas in a container of volume 0.15m^3 at 0c is kept under the pressure of 10 atm. Determine the number of gas molecules in the container
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