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A 200 kilogram roller coaster car travels over the top of a 40-m high hill (Hill A) traveling at 10 meter per second. It then travels down before traveling back up the next hill (Hill B) which is 20 meter high. Let the gravitational potential energy be zero at the ground and assume that the work done by friction and air resistance on the car is negligible. Obtain the speed of the car at the top of the second hill.
A space vehicle accelerates from six second from rest to a speed of 95 m/s. it travels at that speed for another ten seconds. What was its acceleration? What is the total distance it went in all 16 seconds?
Seismographs measure the arrival times of earthquakes with a precision of 0.100 s.7 To get the distance between to the epicenter of the quake, they compare the arrival times of S- and P-waves, which travel at different speeds.
Over the course of a multi-stage 4280-km bicycle race, the front wheel of an athlete's bicycle makes 2.28 106 revolutions. How many revolutions would the wheel have made
A student librarian lifts a 2.2-kg book from the floor to a height of 1.2-m. How much work does he do on the book
At a playground, a 22 {\rm kg} child plays on a slide that drops through a heightof 2.5 {\rm m}. What is the child's speed at the bottem of the slide
q1. a thin horizontal copper rod is .989696 m long and has a mass of 43.3758 g.the acceleration of gravity is 9.8
man hanging upside down is holding a partner who weighs 604 N. what force must the man apply to his partner in the straight-down position
in the quark model of fundamental particles a proton is composed of three quarks two up quarks each having charge 2e3
A 10.0 g object moving to the right at 18.0 cm/s makes an elastic head-on collision with a 15.0 g object moving in the opposite direction at 27.0 cm/s
An empty rubber balloon has a mass of 0.0105 kg. The balloon is filled with helium at adensity of 0.181 kg/m3. what is the tension in the line
What stage of the scientific method would someone be at if they make a prediction that drinking alcohol will make people more violent throughout a sporting event.
A parallel plate capacitor has a capacitance of 5.9 ?F when filled with a dielectric. What is the dielectric constant of the dielectric
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