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You are in charge of testing or designing a new amusement park ride. At the end of the ride, the 1200 kilogram cart (including people) goes down a hill that is angled at 30 degree from the horizontal. The starting height of the cart is 20 meter above the ground, and it is going 5 meter per second at the top of the hill. There is a constant force of friction of 30 Newton on the cart the entire ride. At the bottom of the hill, the cart travels 50 meter before being stopped by a spring that is compressed by 2 meter. Evaluate the spring constant of the spring?
Each shot of the laser gun most favored by Rosa the Closer, the intrepid vigilante of the lawless 22nd century, Find the electric potential energy of the original capacitor when it is charged
A sky-diver jumps out of a plane and achives (terminal velocity) before opening his parachute.Explain what is meant by the term terminal velocity,why it occurs and what value of velocity a typical sky diver might experience.
If a boat has a speed of 6.75 m/s and goes north directlyacross a river and back. How long does it take for the round trip
a sample containing beryllium atomic mass 9 u aluminum 27 u and an unknown element is placed in a mass spectrometer.
A solid piece of aluminum "weighs" 57.6 g in air and 26.5 g when submerged in a liquid. (a) What is the volume of the metal piece? (b) What is the mass density of the liquid?
Find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to six times the earth's radius of 6.38 106 m. . (b) Find the satellite's orbital period.
A highway is to be built between two towns, one of which lies 30.0 km south and 83.0 km west of the other. at what angle would this highway be directed
An objects angular momentum changes by 10 kgm^2/s in 2.0 s. What magnitude average torgue acted on this object
during a tennis match a player serves the ball at a speed s with the center of the ball leaving the racquet at
an uncharged capacitor is connected to the terminals of a 4.0 v battery and 12 mc flows to the positive plate. the 4.0
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800kg/m3 , length 91.6cm and diameter 3.00cm from a storage room to a machinist. Calculate the weight of the rod
You are to design a rotating cylindrical axle to lift 800 N buckets of cement from the ground to a rooftop 78.0 m above the ground. what should the angular acceleration of the axle be
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