EBK PHYSICS FUNDAMENTALS
2nd Edition
ISBN: 9780100265493
Author: Coletta
Publisher: YUZU
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Chapter 4, Problem 39P
(a)
To determine
To Find: The tension in the string connecting the two blocks.
(b)
To determine
To Find:Time required by the hanging mass to fall by
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•7SSMThere are two forces on the 2.00 kg box in the overhead view of Fig. 5-31, but only one is shown. For F1 = 20.0 N, a = 12.0 m/s2, and θ = 30.0°, find the second force (a) in unit-vector notation and as (b) a magnitude and (c) an angle relative to the positive direction of the x axis.
If the acceleration of an object is zero, are no forces actingon it? Explain
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Chapter 4 Solutions
EBK PHYSICS FUNDAMENTALS
Ch. 4 - Prob. 1QCh. 4 - Prob. 2QCh. 4 - Prob. 3QCh. 4 - Prob. 4QCh. 4 - Prob. 5QCh. 4 - Prob. 6QCh. 4 - Prob. 7QCh. 4 - Prob. 8QCh. 4 - Prob. 9QCh. 4 - Prob. 10Q
Ch. 4 - Prob. 11QCh. 4 - Prob. 12QCh. 4 - Prob. 13QCh. 4 - Prob. 14QCh. 4 - Prob. 15QCh. 4 - Prob. 16QCh. 4 - Prob. 1PCh. 4 - Prob. 2PCh. 4 - Prob. 3PCh. 4 - Prob. 4PCh. 4 - Prob. 5PCh. 4 - Prob. 6PCh. 4 - Prob. 7PCh. 4 - Prob. 8PCh. 4 - Prob. 9PCh. 4 - Prob. 10PCh. 4 - Prob. 11PCh. 4 - Prob. 12PCh. 4 - Prob. 13PCh. 4 - Prob. 14PCh. 4 - Prob. 15PCh. 4 - Prob. 16PCh. 4 - Prob. 17PCh. 4 - Prob. 18PCh. 4 - Prob. 19PCh. 4 - Prob. 20PCh. 4 - Prob. 21PCh. 4 - Prob. 22PCh. 4 - Prob. 23PCh. 4 - Prob. 24PCh. 4 - Prob. 25PCh. 4 - Prob. 26PCh. 4 - Prob. 27PCh. 4 - Prob. 28PCh. 4 - Prob. 29PCh. 4 - Prob. 30PCh. 4 - Prob. 31PCh. 4 - Prob. 32PCh. 4 - Prob. 33PCh. 4 - Prob. 34PCh. 4 - Prob. 35PCh. 4 - Prob. 36PCh. 4 - Prob. 37PCh. 4 - Prob. 38PCh. 4 - Prob. 39PCh. 4 - Prob. 40PCh. 4 - Prob. 41PCh. 4 - Prob. 42PCh. 4 - Prob. 43PCh. 4 - Prob. 44PCh. 4 - Prob. 45PCh. 4 - Prob. 46PCh. 4 - Prob. 47PCh. 4 - Prob. 48PCh. 4 - Prob. 49PCh. 4 - Prob. 50PCh. 4 - Prob. 51PCh. 4 - Prob. 52PCh. 4 - Prob. 53PCh. 4 - Prob. 54PCh. 4 - Prob. 55PCh. 4 - Prob. 56P
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- An inclined plane 4.8 meters long and 1.2 meters high is used to raise a 500-kg log onto a truck. If a force of 1500 newtons parallel to the inclined plane is needed to push the load up the incline at constant speed, find the force of friction.arrow_forwardArlene is to walk across a "high wire" strung horizontally between two buildings 10.0 m apart. The sag in the rope when she is at the midpoint is 10.0°, as shown in Fig. 4-39. If her mass is 50.0 kg, what is the tension in the rope at this point?arrow_forwardIf a 2.6 kg object is placed on a horizontal surface, what is its magnitude of acceleration if the coefficient of kinetic friction is known to be 0.448 and an applied force of 31.5 N directed at an angle of -26.4 degrees relative to the +x direction acts on the object?arrow_forward
- An aircraft gains speed during takeoff due to the constant thrust of its engine. When is the acceleration during takeoff greatest-at the beginning of the run along the runway or just before the aircraft lifts into the air? why?arrow_forwardReferring to Fig 4.21b, suppose m2 equals 2.00 kg and it's on a frictionless surface. If m1 = 8.2 kg, someone holds m2 at rest, what will be the tension in the string?arrow_forwardBlock B in Fig. 6-31 weighs 711 N.The coefficient of static friction between block and table is 0.25; angle u is 30; assume that the cord between B and the knot is horizontal. Find the maximum weight of block A for which the system will be stationary.arrow_forward
- In which of the following situations do the forces on the body sum to zero?arrow_forwardBody A in Fig. 6-33 weighs 102 N, and body B weighs 32 N. The coefficients of friction between A and the incline are µs =0.56 and µk =0.25. Angle θ is 40. Let the positive direction of an x-axis be up the incline. In unit-vector notation, what is the acceleration of A if A is initially (a) at rest, (b) moving up the incline, and (c) moving down the incline.arrow_forwardA freight train has a mass of 1.5x 10^7kg. If the locomotive can exert a constant pull of 7.5x 10^5N how long doesit take to increase the speed of the train from rest to 80 km/h?arrow_forward
- For the woman being pulled forward on the toboggan in Figure 4.33, is the magnitude of the normal force exerted by the ground on the toboggan (a) equal to the total weight of the woman plus the toboggan, (b) greater than the total weight, (c) less than the total weight, or (d) possibly greater than or less than the total weight, depending on the size of the weight relative to the tension in the rope?arrow_forwardA service elevator takes a load of garbage, mass 10.0 kg, from a floor of a skyscraper under construction, down to ground level, accelerating downward at a rate of 1.2m/s2 . Find the magnitude of the force the garbage exerts on the floor of the service elevator?arrow_forward
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