Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN: 9781305116399
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 6, Problem 6.64AP
A student builds and calibrates an accelerometer and uses it to determine the speed of her car around a certain unbanked highway curve. The accelerometer is a plumb bob with a protractor that she attaches to the roof of her car. A friend riding in the car with the student observes that the plumb bob hangs at an angle of 15.0° from the vertical when the car has a speed of 23.0 m/s. (a) What is the centripetal acceleration of the car rounding the curve? (b) What is the radius of the curve? (c) What is the speed of the car if the plumb bob deflection is 9.00° while rounding the same curve?
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A ball of mass m moves along a track in the shape of vertical circular loop. There are 2
forces acting on the ball -- the normal force exerted by track (Ntrack) and gravity (mg).
Ignore friction and air resistance.
The vectors v (velocity) and a (total acceleration) have an angle ◊ between them, which
changes as the ball moves.
Check all the answers which are true statements. There may be more than one correct
answer!
when the ball is on the way up the loop, 0 > 90°º
the magnitude of a is always smaller than g, no matter how fast the ball moves
0 = 90° at the "side" points (halfway up the loop)
at the bottom of the loop, Ntrack is stronger than mg
the ball falls off the track if Ntrack
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An Atwood machine consists of two masses hanging from the ends of a rope that passes over a pulley. The masses have the values M(1): 27.0Kg and m(2)= 11.0Kg. Assume that the rope and pulley are massless and that there is no friction in the pulley.
What is the magnitude of the masses' acceleration a?
What is the magnitude of the tension T in the rope?
The 1.0 kg block in the figure is tied to the wall with a rope. It sits on top of the 2.0 kg block. The lower block is pulled to the right with a tension force of 20 N. The coefficient of kinetic friction at both the lower and upper surfaces of the 2.0 kg block is μkμk = 0.42.
What is the acceleration of the 2.0 kg block?
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Chapter 6 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
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