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A truck of mass 9312 kg moving at a speed of 68.7 mph has lost its brakes. Fortunately, the driver finds a runaway lane, a gravel-covered incline that uses friction to stop a truck in such a situation; see the figure. In this case, the incline makes an angle of ? = 21.15° with the horizontal, and the gravel has a coefficient of friction of 0.634 with the tires of the truck. How far along the incline (?x) does the truck travel before it stops?
What is the kinetic energy of a 1,500 kg car with velocity of 72.0 km/hr? How much work must be done on the car to bring it to a complete stop.
In a region where there is an electric field, the electric forces do +8.00x 10^-19 J of work on an electron as it moves from point X to point Y.What is the potential difference, VY - VX, between point Y and point X?
for a particle in a one demention box, the ground state wave function is: psi=(2/L)^1/2 sin(piX/L), What is the probebility that the particle is in the right-hand half on the box
On an essentially frictionless, horizontal ice rink, a skater moving at 4.1 m/s encounters a rough patch that reduces her speed by 49% due to a friction force that is 26% of her weight. find the length of this rough patch
A 49.2-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.637 and 0.439, respectively. What horizontal pushing force is required
A pop bottle style instrument is played being open at one end closed at the other, if two successive frequencies, 350 Hz and 490 Hz, are produced, what is the fundamental frequency,
Eight lights are connected in parallel to a 116 V source by two leads of total resistance 1.1. If 240 mA flows through each bulb, what is the resistance of each? What fraction of the total power is wasted in leads.
A loudspeaker of mass 23m is suspended a distance of h = 1.20 m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 2.9m.
An object falls off of a pier and into the ocean (sea water) where it displaces a total volume of 3.7 cubic meters of sea water
Two cars of collide in a glancing collision and stick together. Before the colli- sion the first car (mass of 500 kg) is moving with velocity 25 m/s at an angle of 30%u25E6 North of East, Determine the momentum of each car in a suitable Cartesian c..
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 60.0?. Dog A exerts a force of 272N , and dog B exerts a force of 346N. Find the magnitude of the resultant force
The sun can be considered an ideal blackbody radiator at a temperature of 5900K, What is the peak wavelength of the distribution
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