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A plane lands at 80 m/s. It coasts along the ground at this constant speed for 4 seconds until the pilot applies the brakes and reverses thrusters which cause the plane to slow down with a constant acceleration. What is the acceleration required for the plane to stop with a total of 500 m starting from landing?
A kayaker paddles with a power output of 60.0 W to maintain a steady speed of 1.40 m/s, by what factor does the kayaker's speed change
300 grams of water at 0 degrees are placed in a copper container weighing 120 grams in which 35 grams of ice (at 0 degrees also). 17 grams of steam at 100 degrees are fed in and completly condensed to water.
monochromatic light strikes a diffraction grating at normal incidence before illuminating a screen 2.10m away. find the distance between the two second-order maxima
A 1,800-kg pile driver is used to drive a steel I-beam into the ground. calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest
A railroad car weighs four times as much as a freight car. If the railroad car coasts at 5 km/h into the freight car that is initially at rest, how fast do the two coast together after they are coupled?
A body is traveling at 5.00 m/s along the positive direction of an x-axis. No net force acts on the body. What is the speed of the forward part
A string passing over a pulley has a 3.90 kilogram mass hanging from one end and a 2.60 kilogram mass hanging from the other end. determine what would be the acceleration of the two masses
Two children, Omar and Melinda, ride on the same merry-go-round. Omar is a distance R from the axis of rotation; Melinda is a distance 2R from the axis. What is the ratio of Omar's angular speed to Melinda's angular speed? What is the ratio of Omar's..
A beam of protons traveling at 1.70 km/s enters a uniform magnetic field, traveling perpendicular to the field. Evaluate the magnitude of the magnetic field
Riders on the "Great American Revolution" loop-the-loop roller coaster wear seatbelts as the roller coaster negotiates its 6.5m -radius loop with a speed of 9.8m/s.
At t = 0 a grinding wheel has an angular velocity of 21.00 rad/s. It has a constant angular acceleration of 21 rad/s^2 until a circuit breaker trips at 2.40s. From then on it turns during 344 rad as it coasts to a stop at constant acceleration.
About 1350 W/m2 of electromagnetic energy reaches the upper atmosphere of the earth from the sun, which is 1.5 × 1011 m away. estimate the average power output of the sun
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