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A plane flies at 1.95 times thespeed of sound. Its sonic boom reaches a man on the ground 1.00 minafter the plane passes directly overhead. What is the altitude of the plane? Assume the speed of sound to be 330 m/s.
we consider a man of mass m 81 kg using crutches. the crutches each make an angle of 28 degrees with the vertical.
A student wearing frictionless in-line skades on a horizontal surface is pushed by a friend with a constant force of 23.00N. How far should the student be pushed, starting from rest, so that her final kinetic energy is 283J.
Suppose that you have a 390 ?, a 780 ?, and a 2.20 k? resistor. What is the maximum resistance you can obtain by combining these
q1. a juggler performs in a room whose ceiling is a height 3.0 m above the level of his hands. he throws a ball upward
An initially stationary hovercraft sits on a large lake. At time t=0 it accelerates due north at a rate of 1.2 m/s2 for 10 s, what is the velocity of the hovercraft at time t=40 s
Two sinusoidal waves of the same period, with amplitudes of 4.0 and 6.0 mm, travel in the same direction along a stretched string; they produce a resultant wave with an amplitude of 9.225 mm. The phase constant of the 4.0 mm wave is 0. What is the..
Cloverleaf exits are approximately circular. A 1597 kg automobile is traveling 56 mph while taking a cloverleaf exit that has aradius of 40.5 m. Calculate the centripetal acceleration of the car and the centripetal force onthe car. Remember that 1..
The spin cycles of a washing machine have two angular speeds, 450rev/min and 623rev/min . The internal diameter of the drum is 0.570m, Find the laundry's maximum tangential speed
A 19 kg solid disk of radius 0.44 m is rotated aboutan axis through its center. If the disk accelerates from rest to anangular speed of 2.5 rad/s while rotating1.0 revolutions, what net torque is required
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 60.7 degrees. Find the the angle the resultant force makes with dog A's rope
A block with mass m = 0.80 kg is forced against a horizontal spring of negligible mass, compressing the spring a distance of 0.20 m. When released, the block moves on a horizontal table top for 1.00 m before coming to rest. The spring constant k is 1..
Three vectors have the same magnitude of 12 units. They make angles of ?, 2 times ? and 3 times ? with respect to the x axis, where ? = 16 o. What is the magnitude of their vector sum
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