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The driver of a truck comes suddenly upon a fallen tree that has blocked the road ahead. A total time interval of 5.45 seconds elapses during which the driver recognizes the hazard, determines the need to brake, hits the pedal, and ultimately slams into the tree. The driver's reaction time uses the first 1.25 seconds of the total time. Once the brakes engage the truck experiences a constant 5.60 m/s^2 deceleration. The truck leaves skid marks on the road surface 62,4 m in length beginning where the brakes first engage and ends at tree. At what speed does truck hit tree and how far does the truck travel during the initial 1.25 second response interval (assume constant velocity)?
A particle in a 436 m long particle accelerator is moving at 0.875 c. How long does the particle accelerator appear to the particle
At a certain instant a ball passes location m. In the next 4 seconds, the ball's average velocity is m/s. At the end of this 4 second time interval, what is the height y of the ball?
The electric field midway between two equal but opposite point charges is 845 N/C, and the distance between the charges is 16.0 cm. What is the magnitude of the charge on each
A wedge of air is formed between two glass plates that are 9.0 cm long, with one edge touching, How far apart are the maxima for the reflected light with ? = 665 nm
A point source of light illuminates an aperture 4.00m away. A 15.0cm- wide bright patch of light appears on a screen 1.00m behind the aperture. How wide is the aperture
A proton starts out moving horizontally from a positive plate to a negative plate of equal size and equal magnitude of charge. Calculate this difference of heights in meters
An artificial lens is implanted in a person's eye to replace a diseased lens. The distance between the artificial lens and the retina is 2.78 cm. What is the power of the implanted lens
A catapult on a cliff launches a large round rock towards a ship on the ocean
a space vehicle is coasting at a constant velocity of 15.7 ms in the y direction relative to a space station. the pilot
An object at rest explodes into three pieces. Two of them are equal in mass and break off at an angle of 88.7° to each other, both by a speed of 33.4 m/s. The last piece has 4 times as much mass as each of the other pieces. What is the magnitude of t..
A 1.9-kilogram mud ball drops from rest at a height of 18 m. If the impact between the ball and the ground lasts 0.56s, Find the final velocity of the 4.90-kg ball if the collision is elastic
At what temperature would the rms speeds be equal to the escape speed from planet earth.
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