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1. How much energy is there in a 70 kg sprinter who has a linear velocity of 12.0 m/s whose center of mass is 115 cm high?
2. How much power would a defensive back need to produce to decelerate the runner from problem #1 to 0.0 m/s in 0.5 seconds? (no change in runners cm height)
3. What work is done by friction on a 30 kg crate that slides along a level surface beginning until it stops if its initial velocity was 6.0 m/s
4. Explain why the application of a large force will not ensure a large power output.
5. To compress a foam pit 0.1 meters requires 200 J of work. How much work is necessary to compress the same pit 0.4 meters? Treat the pit as a spring)
6. Use conservation of energy to determine the height from which a diver fell into the water if the speed at entry was 14 m/s.
Two charged particles on the x axis are separated by a distance d. Obtain a point on the axis where we could place a third charged particle therefore that the net electric force on it would be zero
In an amusement park ride, cars are suspended from L = 4.20 m cables attached to rotating arms at a distance of D = 6.06 m from the axis of rotation. What is the angular speed of rotation
1 the manufacturer of the roto-dyne wheel reports that the mass of the wheels rotating components is 1.41- 0.05 kg.
A rock dropped from a cliff covers one-third of its total distance to the ground in the last second of its fall. Air resistance is negligible. How high is the cliff?
A fighter plane is launched from aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of its engines is 2.3 x 105 N. Determine the work done on the jet by the catapult
A spring with a force constant of 1495 N/m is compressed 11.1 cm. Find the work done by the force compressing the spring
A highway curve with radius 1000{\rm ft} is to be banked so that a car traveling 48.0{\rm mph} will not skid sideways even in the absence of friction
A 2.0 mL syringe has an inner diameter of 6.0 mm, a needle inner diameter of 0.25mm, and a plunger pad diameter (where you place your finger) of 1.2cm. A nurse utilizes the syringe to inject medicine into a patient whose blood pressure is 140/100.
In the All-Alaska ice Floe Softball finals, the right fielder for the Nome IceSox (who is floating on a small chunk of ice in still water) makes an outstanding catch of a line drive. what is the final heading of the fielder just after the ball is c..
A series combination of a 8 kΩ resistor and an unknown capacitor is connected to a 13 V battery. Determine the capacitance of the capacitor
An unstable particle having mass of 5.00x10^-27 kg is initially at rest. Find the rest masses of the fragments
Begin with the appropriate law and derive an expression for the magnetic field at a point P a perpendicular distance R from a long straight wire carying a constant current i. Be sure show and explain all steps.
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