Chapter 5: Q6Q (page 115)
Figure 5-23 shows the same breadbox in four situations where horizontal forces are applied. Rank the situations according to the magnitude of the box’s acceleration, greatest first.
Chapter 5: Q6Q (page 115)
Figure 5-23 shows the same breadbox in four situations where horizontal forces are applied. Rank the situations according to the magnitude of the box’s acceleration, greatest first.
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Get started for freeA block with a weight of 3.0 Nis at rest on a horizontal surface. A 1.0 Nupward force is applied to the block by means of an attached vertical string. (a) What is the magnitude and (b) What is the direction of the force of the block on the horizontal surface?
The tension at which a fishing line snaps is commonly called the line’s “strength.” What minimum strength is needed for a line that is to stop a salmon of weight 85 Nin 11 cmif the fish is initially drifting at? Assume a constant deceleration.
You pull a short refrigerator with a constant force across a greased (frictionless) floor, either withhorizontal (case 1) or with tilted upward at an angle(case 2). (a)What is the ratio of the refrigerator’s speed in case 2 to its speed in case 1 if you pull for a certain time t? (b) What is this ratio if you pull for a certain distance d?
Using a rope that will snap if the tension in it exceeds387 N you need to lower a bundle of old roofing material weighing449 Nfrom a point 6.1 mabove the ground. (a)What magnitude of the bundle’s acceleration will put the rope on the verge of snapping? (b) At that acceleration, with what speed would the bundle hit the ground?
A customer sits in an amusement park ride in which the compartment is to be pulled downward in the negative direction of a yaxis with an acceleration magnitude of, with. A coin rests on the customer’s knee. Once the motion begins and in unit-vector notation, (a) what is the coin’s acceleration relative to the ground and (b) what is the coin’s acceleration relative to the customer? (c) How long does the coin take to reach the compartment ceiling,above the knee? In unit-vector notation, (d) what is the actual force on the coin and (e) what is the apparent force according to the customer’s measure of the coin’s acceleration?
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