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An electric vehicle starts from rest and accelerates at a rate a1 in a straight line until it reaches a speed of v. The vehicle then slows at a constant rate a2 until it stops.
(a) How much time elapses from start to stop?
(b) How far does the vehicle move from start to stop? Give your answers in terms of the given variables.
A loudspeaker of mass 19.0 kg is suspended a distance of = 1.60 m below ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 3.30m . What is the tension in each of the cables.
A cancer patient is undergoing radiation therapy in which protons with an energy of 1.2 MeV are incident on a 0.25 Kg tumour. (a) If the patient receives an effective dose of 1.0 rem, what is the absorbed dose? (b) How many protons are absorbed by..
How much friction must be exerted between the skates and ice.
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1360 Hz. What is the speed of the bird
A rescue plane flies horizontally at a constant speed searching for a disabled boat, If it takes the sound 2.10 s to reach the plane, determine the speed of the plane and What is its altitude
A circular coil, with radius of 10 cm, and 25 turns, rotates in a constant magnetic field of strength 2.4 T, If the magnetic field that the coil is in points down the page, which direction does the coil rotate
A uniform wooden plank of mass 15kg and total length 10m rests on two supports. Find the forces of the two supports on the plank
A 128-cm-long pipe is stopped at one end. Near the open end, there is a loudspeaker that is driven by an audio oscillator, What is the lowest frequency of the oscillator that will produce resonance within the tube
The potential difference between the ends of a resistor is 9 V and the rate of energy dissipation in it is 18 W. What is the value of that resistor
An arrow is fired with a speed of 23 m/s at a block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into block before coming to rest relative to it. All through this process the arrow's deceleration has the magnit..
A professor walks in a long hall carrying a vibrating 512Hz tuning fork. The end of the hall is closed so that sound reflects from it. The student hears 4 beats per second. How fast is the student walking and in what direction.
A conveyer belt with an incline of 10 degrees, is designed to load gravel into the center of a truck bed located 9 feet away from the end of the belt, Determine the velocity of the belt
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