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 machiny:v2q( zkt3nk, n.7/ov9ztoev 9rzzde can NOT do which 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 46pep c+f.x (n2sd qc*am k;wgmechanical advantage for the pulley system shown to the right? sg.*4 d(q;capw+2 xf6mcekpn

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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 inclifnreu 6 u vl4;4gt 1/ec,vk5 zd(juge.ned plane and pulley shown, a 75N force is required to slide a box4vk6gtg;f,4 uc5/lzvjee (ru.u n ed 1 with mass M=10 kg up the incline at a constant speed. What is the efficiency 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 plane shown, a force of 150 N applied parri(z, vvkuhes; ,q(q5allel to the incline’s surface is needed to pull the object of mass M=10 kg along the entire length o ,(ui5;e,hrzkqq (vvs f 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 choices best r4qrhvr1ve 1f -epresents the v -rv11req4vfhalue of the incline’s ideal mechanical 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 object6t /ddw(+roh h of mass 2.0 kg moves along the x- axis with a velocity of +4.0 m/s. A net horizontal force acting along the x-axis is applied to the object with r h(hw/+ot6 ddthe 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 moves along the +x- axiys6 1it6b0 i0w4(zgdtpr9pcgb ja )8hs with a kinetic enet )y(6r1h9a bjc0dw gi6 iz04bgt8 ppsrgy of 16.0 J. A net horizontal 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 ahead-on collisig:f 8 pfuc yf0+ ,k/yqo(sekh9on 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 fro:y9yf qpgo(c /k8kf hu s0,+efm 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 n05u06tesm su r,ze;z make ahead-on collision 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 res srsu5eem0zzt, n6u ;0t. A graph of the force exerted onto Body 2 from Body 1 during the collision is shown.
How much kinetic energy was transformed to other kinds of energy from the collision?

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