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An engineer sets out from home to attend a meeting. For the first 90 minutes, she drives east at 30 km/h, then slows down to 10 km/h (still heading east) for the next 5 km. Traffic then comes to a standstill for one hour. After this time, she realizes that she will miss the meeting, so she drives home at 60 km/h. (Assume that all motion is along a straight line.)
a. Draw a velocity versus time graph for her journey.
b. Draw a position versus time graph for her journey.
A piston of radius r = 0.05 m has a stroke within a cylinder of S = 0.2 m. At the bottom of the stoke the cylinder fills with air at T1 = 22.4 C and a pressure of P1 = 100 kPa. What would be the length of the cylinder
Define a lie in the strict or formal sense and explain what is meant by communication - what is the principal purpose of communication?
The transverse displacement (y) of a wave is given as a function of position (x in meters) and time (t in seconds) by the expression to the right. Determine the wavelength, frequency, period, and phase constant of this waveform.
A 340-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 28° with the horizontal. What is the angular speed of the sphere
A mass-spring system oscillates with an amplitude of 4.60 cm. If the spring constant is 240 N/m and the mass is 435 g, determine the mechanical energy of the system. Calculate the speed of the sphere's CM at the bottom of the ramp. Determine the m..
A 4.0 kg cube of iron slides from rest down a frictionless ramp (1.5 m above flat surface), How fast are they going after the collision
A disk spinning with angular velocity , w=12 rad/s slows down to a stop in 4 seconds. What is the angular displacement delta theta
A string is attached to a rigid support and the cylinder allowed to drop from rest. Find out the acceleration of the cylinder.
A 3-kg sphere makes and inelastic collinsion with a second sphere initially at rest. What is the mass of the second sphere
A 1.0 ball hangs from the ceiling of a truck by a 1.0--long string. The back of truck, where you are riding with the ball, has no windows and has been completely soundproofed. The truck travels along an exceedingly smooth test track, and you feel no ..
Find an expression for the volume charge density ?(r) inside the ball as a function of r. Express your answer in terms of the variables Q, r, R, and appropriate constants
Three identical freight cars are sitting on the tracks, each separated by a small distance. A fourth car is coasting with velocity 4 m/s. How fast are the four cars moving
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