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The angular speed of an automobile engine is increased at aconstant rate from 1200 revs/min to 3000 revs/min in 12 seconds.(a) What is the angular acceleration in revs per minute-squared.(b) How many revs does this engine make during this 12 secondinterval.
A 3kg model rocket initially at rest experiences an average force of 3950N over a distance of 200 cm. How much has the rockets kinetic energy increased
Two particles each have a mass of 5.80 10-3 kg. One has a charge of +5.0 10-6 C, and the other has a charge of -5.0 10-6 C. They are initially held at rest at a distance of 0.70 m apart. Both are then released and accelerate toward each other. How fa..
Two violins are supposed to be playing concert A, at 440 Hz [{\rm Hz}], What beat frequency do the violinists hear
A model of a helicopter rotor has four blades, each 3.60 m in length from the central shaft to the bladetip. What is the radial acceleration of the blade tipexpressed as a multiple of the acceleration due to gravity,g?
A 21 kg solid door is 220 cm tall, 94 cm wide. What is the door's moment of inertia for rotation about the vertical axis inside the door, 17 cm from one edge.
A child suddenly runs into the street. If it takes the driver 0.80 s to react and apply the brakes, explain how many meters will the car have moved before it begins to slow down?
The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. What does it weigh on the moon
a 930 kg electric car uses a 270 v battery pack. as the car accelerates from rest 360 c flows from the battery.whats
gas at constant t and p is contained in a supply line connected through a valve to aclosed tank containing the same gas
A string of length L, which is clamped at both ends and has a tension T, is pulled aside a distance h at its center and released. What is the energy of the subsequent oscillations
A rocket ship of proper length l0 trav- els at constant speed v in the x-direction relative to a frame S. The nose of the ship passes the point x = 0 (in S) at time t = 0
A uniform metal ball of mass 31g and radius 1.4cm rollsdown(without slipping) a slope of height 32cm from rest. Find its linear speed and angular speed
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