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Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force exerted on him by the pole has a magnitude of 825 N, and his speed at the bottom of the pole is 3.7 m/s. How far did he slide down the pole?
A rock is thrown vertically upward from ground level. 1.2 s later it reaches its maximum height and 1.8 s later, what is the height of the tower
A 25 gram ball is fired with an initial speed v1 toward a 125 gram ball that is hanging motionless from a 1.25 meter string. The balls have a perfectly elastic collision. As a result, the 125 gram ball swings out until the string makes an angle of..
A 550 -cm flask contains 0.450grams of a gas at a pressure of 140kPa, What is the molecular mass of this gas
What is the maximum velocity.
The rotor in a certain electric motor is a flat, rectangular coil with 81 turns of wire and dimensions 2.57 cm by 4.32 cm. Find the maximum torque acting on the rotor
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.10 m2 and whose thickness is 7 mm. what is the percentage lost by the window
q1. a weather vane at first at rest has a moment of inertia of 0.111 kg bull m2 about its axis of rotation. a 53.0 g
the label on a soft drink states 15.fl oz (444g) provides 220 kcal. The drink is cooled to 15degree Celsius before it's consumed. Find net energy content of drink
A cylindrical pulley with a uniform solid disk shape has a radius of 10.0cm and a mass of 0.80kg. At this point, what total percentage of the kinetic energy does the pulley have
A "105-watt" lightbulb uses an average power of 105 W when connected to an rms voltage of 120 V. What is the resistance of the lightbulb
q1. a helicopter is ascending vertically with a speed of 5.57. at a height of 124 above the earth package is dropped
A solid ball and a hollow ball, each with a mass of 2 kg and radius of 0.1 m, start from rest and roll down a ramp of length 3 m at an incline of 44°. What is the speed of the ice cube at the bottom of the incline
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