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A brave but inadequate rugby player is being pushed backwards by an opposing player who is exerting a force of 800 n on him. The mass of the losing player plus equipment is 90.0kg, and accelerating at 1.20m/s2 backwards. (a) What is the force of friction between the losing player's feet and the grass. (b)What force does the winning player exert on the ground to move forward if his mass plus equipment is 110kg? (c) Draw a sketch of the situation showing the system of interest used to solve each part . For this situation, draw a free-body diagram and write the net force.
A solid sphere has a temperature of 527 K. The sphere is melted down and recast into a cube that has the same emissivity and emits the same radiant power as the sphere. What is the cube's temperature in kelvins?
how many joules of potential energy does 1.5-kg book gain when it is elevated 2 m? when it is elevated 4 mlet g 10
a how much work is done on the steam when 1.00 mol of water at 100 degrees celcius boils and becomes 1 mol of steam at
A rocket is launched at an angle of 58.0�° above the horizontal with an initial speed of 102 m/s. Find the maximum altitude reached by the rocket
Calculate the allowable range of initial velocities we may impart to the ball so that it stops in the range1.0 m short to1.0 m long of the cup.
What pressure is acting on the walls of drum
A point charge has a charge of 2.50 x 1011 C. Find at what distance from the point charge is the electric potential 29 V? Take the potential to be zero at an infinite distance from the charge
a spring is hanging vertically from a ceiling. assume the springs mass is negligbile. i hang a 0.5kg mass on the spring
The current indoor world record time in the 200-m race is 19.92 s, held by Frank Fredericks of Namibia (1996), Find the mean speed in meters per second corresponding to the record time for the 200-m event
A disk of mass m1 and radius R1 is rotating about the center around a thin axle with an initial angular velocity of ω. Evaluate the initial angular momentum of the system
A four-turn circular wire coil of radius 0.565 m lies in a plane perpendicular to a uniform magnetic field of magnitude 0.340 T. what is the average induced emf in the wire during this time
A flashlight bulb carries a current of 0.18A for 77s. How much charge flows through the bulb in this time
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