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To strengthen his arm and chest muscles, an 75.0 kg athlete 2.00 m tall is doing a series of push-ups as shown in the figure below . His center of mass is 1.20 m from the bottom of his feet, and the centers of his palms are 30.0 cm from the top of his head. Find the force that the floor exerts on each of his feet and on each hand, assuming that both feet exert the same force and both palms do likewise. Find the force that the floor exerts on each of his feet, assuming that both feet exert the same force. F= ? Units= N Find the force that the floor exerts on each of his hand, both palms exert the same force F= ? Units= N
A 7.40-nC charge is positioned 1.70 m from a 4.80-nC charge. (a) Find the magnitude of electrostatic force that one particle exerts on the other. (b) Is the force attractive or repulsive.
Seven-and-a-half seconds later the astronaut comes into contact with the shuttle. Elucidate what was the initial distance from the shuttle to the astronaut
A 20 g bullet traveling at 300 m/s is shot into a 4.0 kg block at rest on a frictionless horizontal surface. What is the speed of the block right after shooting
A car drives straight off the edge of a cliff that is 60 m high. The police at the scene of the accident observed that the point of impact is 134 m from the base of the cliff. How fast was the car traveling while it went over the cliff.
how far is this point horizontally from the end of the ramp. A skateboarder shoots off a ramp with a velocity of 6.2 m/s, directed at an angle of 61° above horizontal. The end of the ramp is 1.5 m above the ground.
A transformer with 120. turns in its secondary supplies 12. volts at 220. ma to a toy train. The primary is connected across a 120. V wall outlet. What power is delivered by the wall outlet
The loaded cab of an elevator has a mass of 3000kg and moves 216-m up the shaft in 23s at constant speed. At what average rate does the force from the cable do work on cab.
The allowed energies of a simple atom are 0.00 eV, 4.25eV , and 6.64eV. What wavelengths appear in the atom's emission spectrum
Let x= the radius of earth's orbit=1 Au. and y = the radius of venu's orbit = 0.723 Au. and let d = the distance between venus and earth in AU. What are the largest and smallest values of d
After inverting the tube 100 times, the temperature of the lead shot is found to have increased by 30C. Calculate the work done on the lead shot
What is the moment of inertia of flywheel
You are standing on a sidewalk when a police car passes you traveling 25 m/s and sounding its siren. what is the frequency of the sirens on the police cars
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