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A cameraman on a pickup truck is traveling westward at 24 km/h while he videotapes a cheetah that is moving westward 25 km/h faster than the truck. Abruptly, the cheetah stops, turns, and then run at 42 km/h eastward, as gauged by a suddenly nervous crew member who stands alongside the cheetah's path. The change in the animal's velocity takes 2.3s. What are the (a) magnitude of the cheetah's acceleration according to the cameraman and the (b) magnitude of the cheetah's acceleration according to the nervous crew member?
A horizontal force of 12 N pushes a .5 kg book against a vertical wall. The book is initally at rest. compute the magnitude of the frictional force
An amusement ride consists of a car moving in a vertical circle on the end of a rigid boom. The radius of the circle is 32 meters. What is the force of the boom on the car
Fraternal twins Jack and Jill are sent in two different ships to fetch water from the planet Kusbane that is 20 lightyears away. Which twin is older
A small plane tows a glider at constant speed and altitude. If the plane does 2.09 105 J of work to tow the glider 130m, what is the angle between the tow rope and the horizontal
A cell phone battery uses chemistry to create a charge separation between the terminals (anode and cathode). How many free electrons does the battery contain
The Earth's radius is 6370 km . There is a downward-pointing electric field in the atmosphere above the Earth's surface, What is the flux of the electric field out of the Earth, What is the charge on the Earth
A 66-N m torque acts on a wheel with a moment of inertia 175 kg m2. If the wheel starts from rest, explain how long will it take the wheel to make one revolution?
A child on a swing-set swings back and forth. If the length of the supporting cables for the swing is 2.8 m, what is the period of oscillation
A 1.10 kg mass is attached to a light cord that is wrapped around a pulley of radius 7.30 cm, which turns with negligible friction. Themass falls at a constant acceleration of 2.35 m/s2. Find the moment of inertia ofthe pulley.
A 940 gram rock is whirled in a horizontal circle at the end of a 1.2 meter long string, find what angle does the string make with the horizontal
It takes 18 minutes to fill a 1.2 m3 horse trough. It is filled with water from a hose with diameter 2 cm. What is the flow rate of the water
Suppose a monatomic ideal gas is contained within a verticalcylinder that is fitted with a movable piston. The piston isfrictionless and has a negligible mass. Through what distance does the piston drop
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