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1. A 50 kg hiker starts at an elevation of 2500 meters and climbs to the tope of a 3500 meter mountain in 4 hours.
A. What was the work done by the hiker?
B. What was his power output in watts C. What was his power output in horse power. 1 H.P. = 750 watts
The staircase has a y length of 13 meters. An X length of 13 meters as well. What would be the optimal length of each steps x length and y length, if the required amount of step of a staircase is 20.
A flywheel with a very low friction bearing takes 1.6 h to stop after the motor power is turned off. The flywheel was originally rotating at 41 rpm. What was the initial rotation rate in radians per second
A methane bubble 1.00 cm in diameter is released from the bottom of a lake 5.00 m deep. The temperature at the bottom of the lake is 4 °C. How many methane molecules are in the bubble
A circular coil of wire of 200 turns and diameter 3 cm carries a current of 3 A. What is the torque on the coil
how much work would it take to rotate a 10 cm diameter loop carrying 25 a of current with a normal vector oriented 30
A 1000 kg car zooms around a circular bend with a radius of 100m at 20 m/s. What direction is the force in on the car
A cooling fan is turned off when it is running at 850rev/min. It turns 1500 revolutions before it comes to astop. What is the fan's angular acceleration
A hockey player (76 kg) and a puck (0.2 kg) start out at rest on an ice rink. determine how fast the player will recoil after the slap shot
A ball of mass m moving with velocity v_i_vec strikes a vertical wall. What is the final angle theta_f that the ball's velocity vector makes with the negative y axis
A particle of mass 4m is placed at a distance of 2.00 m from another particle of mass m. how far will that be orbiting around the earth
a generator at hoover dam can supply 396 mw of electrical power. assume that the turbine and the generator are 83.1
The football started on the ground 63yrds from the base of the goal posts and just barely cleared the 10ft high bar. How long after the ball was struck did it past through the goal posts
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