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A ball is thrown upward with a speed of 10m/s relative to aballoon that is 50m above the ground while it is moving downwardwith a speed of 5m/s. How long does the object take to hit the ground?
A student sits on a rotating stool holding two 4.0-kg objects. When his arms are extended horizontally, Find the new angular speed of the student
A 43 kg girl and an 8.4 kg sled are on the frictionless ice of a frozen lake, 17 m apart but connected by a rope of negligible mass. What is the acceleration of the girl
A house painter stands 3 m above the ground on a 4.9-m-long ladder that leans against the wall at a point 4.7 m above the ground. find the force of friction that the driveway exerts on the bottom of the ladder
A hockey puck is hit on a frozen lake and starts moving with a speed of 13.2 m/s. Five seconds later, its speed is 6.10 m/s. How far does the puck travel during the 5.00 s interval
An air puck of mass m1 = 0.24 kg is tied to a string and allowed to revolve in a circle of radius R = 1.0 m on a frictionless horizontal table. What is the horizontal force acting on the puck
A more realistic car would cause wheels to spin in a manner that would result in the ground pushing it forward with a steady force.
area ratio. i know that at a temperature of 3000k the power was 4.59 x106 wm2 and at 6000k the power was 7.35 x107 wm2
a frictionless pulley which can be modeled as a 0.80 solid cylinder with a 0.30 m radius has a rope going over it. The tension in the rope is 10 N on the right side and 12 N on the left side. What is the angular acceleration of the pulley.
q1. a propeller spins at 1890 revmin.a what is its angular velocity in rads?b what is the angular displacement of
You are standing at a red light on SW 8th Street at 97th Avenue. The light turns green, find the work done on your car by the frictional force
A charge -305e is uniformly distributed over one face of a circular disk of radius 2.90 cm. What is the surface charge density over that face
An early .75 caliber rifle fires a 12 gram spherical ball at 800 ft/sec with a spin of 1 revolution per 114 mm. How much energy is in the rifle ball
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