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The driver of a car wishes to pass a truck that is traveling at a constant speed of 20.2 m/s. Initially, the car is also traveling at a speed 20.2 m/s and its front bumper is a distance 24.3 m behind the truck's rear bumper. The car begins accelerating at a constant acceleration 0.590 m/s^2, then pulls back into the truck's lane when the rear of the car is a distance 27.0 m ahead of the front of the truck. The car is of length 4.90 m and the truck is of length 20.2 m. How much time is required for the car to pass the truck? What distance does the car travel during this time? What is the final speed of the car?
A diffraction grating has 4436 lines/cm. Light that contains all wavelengths between 447 and 650 nm shines on the grating. Calculate the width of the dark area
at point A, 3.00 m from a small source of sond that is emitting uniformly in all directions, the sound level is 53.0 dB. what is the intensity of the sound at point A
A rocket is lauchned upward with a velocity of 3m/s. How long does it take to reach the top of its trajectory
A block of mass m is initially at rest on a frictionless surface. At time t = 0, an increasing force given by F = kt2 is applied to the block. Find the velocity and the displacement of the block as a function of time and graph x and v versus t.
Most of the motion generated by joints in the human body are examples of levers. An example of a third class lever is the forearm; what force is exerted by the biceps muscle
Water is pumped out of a well at 5.000 m/s through a 8.000 cm diameter hose. The well is 30.00 ft deep. What power is needed by the pump
A shopper pushes a cart 44- m south down one aisle and then turns 90.0° west and moves 30 m. He then makes another 90° turn and moves 13 m.
Calculate the rate of heat conduction through house walls that are 13.0cm thick and that have an average thermal conductivity twice that of glass wool. Assume there are no windows or doors.
A wheel and axle has its matter distributed like a solid disk. (I=1/mR^2) It has a radius of 0.60m and a mass of 0.50kg, how many turns does the wheel make in 2.0sec
A 0.25 kg skeet (clay target) is fired at an angle of 28 degrees to the horizon with a speed of 25 m/s.
A suitcase falls out of an airplane which is 400 meters above the ground. What is the time it takes for the suitcase to reach the ground
A 75 g Frisbee is thrown from a point 1.2 m above the ground with a speed of 14 m/s. find the reduction in Emec of the Frisbee-Earth system
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