Chapter 5: Force and Motion-I

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Pages: 94 - 123

Book edition 10th Edition

Author(s) David Halliday

Pages 1328 pages

ISBN 9781118230718

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112 Questions for Chapter 5: Force and Motion-I

A0.150 Kgparticle moves along an xaxis according to x(t)=-13.00+2.00t+4.00t2-3.00t3, with xin meters and tin seconds. In unit-vector notation, what is the net force acting on the particle at t= 3.40 s?

Found on Page 117
Figure 5-27 shows three blocks being pushed across a frictionless floor by horizontal forceF→. What total mass is accelerated to the right by (a) forceF→, (b) forceF→21on block 2 from block 1, and (c) forceF→32on block 3 from block 2? (d) Rank the blocks according to their acceleration magnitudes, greatest first. (e) Rank forcesF→,F→21andF→32, and according to magnitude, greatest first.

Found on Page 116
A 2.0kgparticle moves along an xaxis, being propelled by a variable force directed along that axis. Its position is given by role="math" localid="1657014461331" x=3.0m+(4.0m/s)t+ct2-(2.0m/s)t3, with xin meters and tin seconds. The factor cis a constant. Atthe force on the particle has a magnitude of 36Nand is in the negative direction of the axis. What is c

Found on Page 117
A vertical forceF→ is applied to a block of mass m that lies on a floor. What happens to the magnitude of the normal forceF→N on the block from the floor as magnitudeF→ is increased from zero if force is (a) downward and (b) upward?

Found on Page 116
Two horizontal forces F1→and F2→act on a 4.0kgdisk that slides over frictionless ice, on which an x-ycoordinate system is laid out. Force F1→is in the positive direction of the xaxis and has a magnitude of 7.0N. Force F2→has a magnitude of9.0N. Figure gives the xcomponent Vxof the velocity of the disk as a function of time tduring the sliding. What is the angle between the constant directions of forces F1→and F2→?

Found on Page 117
Figure 5-28 shows four choices for the direction of a force of magnitude F to be applied to a block on an inclined plane. The directions are either horizontal or vertical. (For choice b, the force is not enough to lift the block off the plane.) Rank the choices according to the magnitude of the normal force acting on the block from the

Found on Page 116
Figure 5.33 shows an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 98 N on the wall to which it is attached. The tensions in the three shorter cords areT1=58.8N,T2=49.0Nand T3=9.8N. (a) What is the mass of disk A (b) What is the mass of disk B, (c) What is the mass of disk C, and (d) What is the mass of disk D?

Found on Page 117
A 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?

Found on Page 117
(a) An 11.0 kgSalami is supported by a cord that runs to a spring scale, which is supported by a cord hung from the ceiling (Figure-a). What is the reading on the scale, which is marked in weight units? (b) In Figure-bthe salami is supported by a cord that runs around a pulley and to a scale. The opposite end of the scale is attached by a cord to a wall. What is the reading on the scale? (c) In Figure-c the wall has been replaced with second11.0 kg salami, and the assembly is stationary. What is the reading on the scale?

Found on Page 117
Some insects can walk below a thin rod (such as a twig) by hanging from it. Suppose that such an insect has mass mand hangs from a horizontal rod as shown in Figure, with angleθ=40°its six legs are all under the same tension, and the leg sections nearest the body are horizontal. (a) What is the ratio of the tension in each tibia (forepart of a leg) to the insect’s weight? (b) If the insect straightens out its legs somewhat, does the tension in each tibia increase, decrease, or stay the same?

Found on Page 117

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Chapter 5: Force and Motion-I

Fundamentals Of Physics

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112 Questions for Chapter 5: Force and Motion-I

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