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Suppose you are driving on the interstate at 90 mph when you see a highway patrol car parked upahead. You apply your brakes, decelerating at a constant rate of4.4 mph/sec until you have reduced your speed to 65 mph. You then maintain aconstant speed of 65 mph. You pass the patrol car 18 seconds after you initially applied the brakes and are relieved that he doesn't pull out after you. How far away was the highway patrol car when you first saw it?
A solid sphere with mass m = 1.5 kg a radius r = 0.20 m rolls without slipping on a flat surface with an angular velocity of ? = 7.2 rad/s. What is the total kinetic energy of the sphere
A thin, uniform rod is hinged at its midpoint. To begin with, one half of the rod is bent upward and is perpendicular to the other half. What is the angular velocity of the straight rod
A kangaroo is capable of jumping to a height of 2.62 m. Determine the takeoff speed of the kangaroo
Catapult fires an 800-kg rock with an initial velocity of 100 m/sat a 40° angle from ground. What is the magnitude of the horizontal impulse
A planet of mass m = 8.15 Ã? 1024 kg is orbiting in a circular path a star of mass M = 6.05 Ã? 1029 kg. What is the orbital period (in earth days) of the planet Tplanet
You are pushing a 150-kg wooden crate in a straight line a distance of 4.5 m across a wooden floor at constant speed. What is the work done by friction on the crate
A toy train is pushed forward and released at with a speed of 2.0 m/s. It rolls at a steady speed for 2.0 s, What is the magnitude of the train's acceleration after its wheel begins to stick
The potential energy stored in the compressed spring of a dart gun, Find by how much is the spring is compressed
q1. suppose we had a rubber ball like the ones used for racquetball and put it inside a container with liquid nitrogen.
A uniform magnetic field of magnitude B= 1.2 teslas is directed toward the bottom of the page in the -y direction as shown above. At time t=0, a proton p in field is moving in the plane of the page with a speed v0= 4 x 10^7 meters per second in a ..
A long straight wire has fixed negative charge with a linear chargedensity of magnitude 4.0 nC/m. The wire isto be enclosed by a coaxial, thin-walled, nonconducting cylindricalshell of radius 1.6 cm.
Aluminum's density is 2700 kg/m^3. An aluminum cube 3.4cm on a side is placed on a scale. What does the scale read when the cube is entirely in air
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