Mechanical Advantage - 无忧得胜-网上国际课程 (5edu.win)

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1#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

99.10: A simple machine can NOT do wvp 64bx6p2zda45;yrs:ld q ox hich of the following:

A. have a mechanical advantage greater than 1.

B. change the direction of the force.

C. move the resistance a greater distance than the applied force.

D. increase the energy put into it.

E. produce a force on the resistance which is greater than the applied force.

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

08.13: What is the ideal mechanical advantage q(;xq(h jkd 9mfor the pulley system shown to the rij(q(qx9; m hkdght?

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

09.39: For the compound machine comprised of the inclined plane and pulley val(,8zz2599uf k hb z,*zbuq p ksv/w shown, a 75N force is required to slide a box with mass M=10 kg up the incline at a constant speed. What is the eff9 ksv8*,qfz2k w(zvpzlub9z/5hb au,iciency of this compound machine?

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

11.36: For the inclined p+tz fd0va2i(plane shown, a force of 150 N applied parallel to the incline’s surface is needed to pull the object t(za 02vpdif +of mass M=10 kg along the entire length of the incline’s surface at a constant speed. What is the actual mechanical advantage (AMA) for this scenario?

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

16.13: For the inclined plane shown, which one of the following choicy7b1 pg/uz 8(xow)sgees best represents the value of the incline’s ideal mechanical sw(ypo/ z1gxe87gub) advantage?

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

03.45: A point-like objec oy*u)f-u9 nmpt of mass 2.0 kg moves along the x- axis with a velocity of +4.0 m/s. A net horizontal force *u-)fumny9 o pacting along the x-axis is applied to the object with the force-time profile shown. What is the total work that was done by the force?

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

06.17: A point-like object of mass 2.0 kg mce s1*ian8f:y,9dv(f ys x bk-oves along the +x- axis with a kinetic energy of 16.0 J. A net horizoni8( sn :*x,1ffda yyvseb9-k ctal force acting along the x-axis is applied to the object with the force- position profile shown. What is the total impulse delivered by the force (units in kg m/s).

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

15.27: On a frictionless horizontal surface, two bodies make ahead8h9(js5yx/tqih ttu,k 4ugn0oi; o 8t-on collision and stick togetheo8uih8qtt0 hjts n ukto5gx i9(y,4 /;r. Body 1 has a mass of 3.5 kg and initially moves to the right with speed 7.0 m/s. Body 2 initially is at rest. A graph of the force exerted onto Body 2 from Body 1 during the collision is shown.
What is the mass of Body 2?

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

15.28: On a frictionless horizontal surface, two bodies make ahead-on colliszkr 5ozhy qepza+z:-9p11b zf)d+ - miion and stick together. Body 1 has a mass of 3.5 kg and initially moves to the right with speed 7.0 m/s. Body 2 initially is at rest. A graph of the force exerted onto Body 2 from Body 1 during the collisi krq ez++h-:pz zi)-ymf5z da19pboz 1on is shown.
How much kinetic energy was transformed to other kinds of energy from the collision?

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