## Transcribed Text

A flatbed truck is carrying a heavy crate. The coefficient of static friction between the crate and the bed of the truck is 0.78. What is the magnitude of the maximum rate at which the driver can decelerate and still avoid having the crate slide against the cab?
m/s²
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-/1 points Giancoli7 4 .P.042.
A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.25 and the push imparts an initial speed of 4.1 m/s?
m
-/4 points Giancoli7 5.P.001.
A child sitting 1.00 m from the center of a merry-go-round moves with a speed of 1.40 m/s.
(a) Calculate the centripetal acceleration of the child.
m/s
-Direction--
(b) Calculate the net horizontal force exerted on the child (mass = 25.0 kg).
N -Direction-
+ -/1 points Giancoli7 5. P.005.
A 0.40 kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.2 m on a frictionless horizontal surface. If the cord will break when the tension in it exceeds 61 N, what is the maximum speed the ball can have?
m/s
+ -/1 points Giancoli7 5.P.008.
How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 87 m at a speed of 92 km/h?
-/2 points Giancoli7 5.P.010.
A bucket of mass 1.60 kg is whirled in a vertical circle of radius 1.00 m. At the lowest point of its motion the tension in the rope supporting the bucket is 25.0 N.
(a) Find the speed of the bucket.
m/s
(b) How fast must the bucket move at the top of the circle so that the rope does not go slack?
m/s
A ball on the end of a string is revolved at a uniform rate in a vertical circle of radius 80.0 kg.
mg
Fri
Fr2
mg
(a) Calculate the tension in the string when the ball is at the top of its path.
N
(b) Calculate the tension in the string when the ball is at the bottom of its path.
N

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