А- В The figure above shows a track consisting of a straight section that connects to a circular section. Three locations are indicated: location A on the straight section of the track, location B at the bottommost point of the track, and location C at the point where the track is vertical. Locations A and C are at the same height. A block is released from rest at the top of the straight section of the track. There is negligible friction between the track and the block. (a) Is the magnitude of the normal force exerted on the block by the track at location A greater than, less than, or equal to the normal force at location B? Justify your answer. B I U x² X, 5 ¢ 2 !! II

А- В The figure above shows a track consisting of a straight section that connects to a circular section. Three locations are indicated: location A on the straight section of the track, location B at the bottommost point of the track, and location C at the point where the track is vertical. Locations A and C are at the same height. A block is released from rest at the top of the straight section of the track. There is negligible friction between the track and the block. (a) Is the magnitude of the normal force exerted on the block by the track at location A greater than, less than, or equal to the normal force at location B? Justify your answer. B I U x² X, 5 ¢ 2 !! II

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter6: Applications Of Newton’s Laws Of Motion

Section: Chapter Questions

Problem 34PQ

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A car starts rolling down a 1-in-4 hill (1-in-4 means that for each 4 m traveled along the sloping road, the elevation change is 1 m). How fast is it going when it reaches the bottom after traveling 55 m? (a) Ignore friction. (b) Assume an effective coefficient of friction equal to 0.10.
figure A) A 2.0 kg object slides to the right on a surface having a coefficient of kinetic friction 0.25 figure B) the object has a initial speed vi = 3m/s when it makes contact with a light spring that has a spring constant of 50 N/m. figure c) The object comes to rest after the spring has been compressed by distance d. For this problem set, use g = 10m/s^2. 1)Find the distance of the compression d in figure C. Answer (in [m]) to 2 decimal places. 2)Find the speed v (in m/s) at the unstretched position when the object moves to the left in figure D. Answer to 2 decimal places in m/s 3) Finally, in figure E, the object comes to rest at distance D to the left of the unstretched spring. Find D. Answer to two decimal places, in [m].
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You are the physics consultant working on an action movie set where an SUV must start from rest, accelerate along a pier, and jump over a stretch of water to land in a departing ferry. (The director assures you it will all be very exciting.) The drawing below shows the situation. The SUV has four-wheel drive (see problem N5D.1), and the coefficients of friction between the tires and the pier’s surface are us =3/4 and uk = 1/2. Calculate the length L (as a fraction or multiple of D) of the run along the pier that you will need for the SUV to make it to the ferry. Ignore air drag.
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A 1.5-kg block initially at rest at the top of a 3-m incline with a slope of 30° begins to slide down the incline. The upper half of the incline is frictionless, while the lower half is rough, with a coefficient of kinetic friction μk = 0.3. (a) How fast is the block moving midway along the incline, before entering the rough section? (b) How fast is the block moving at the bottom of the incline?
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