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 which of the folqut pevxqn;,1u1dn+/ t//e jllowing:

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 for u(sk*3opp u f 4:vm: s0frgav-the pulley system shown to the ri: *fus -:(uma3p vos0 vgp4rkfght?

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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 sb+h 5 4xbqpm0the inclined plane and pulley shown, a 75N force is required to slide a box with mass M=10 kg up the incb0s4+5hbqpm xline 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 fqie3pr 06ama:ec: 2q N applied parallel to the incline’s surface is neiaqqcfmpe:2 r a0:6 e3eded to pull the object 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 ons7gv.)o4fy4 dk4g mvye of the following choices best represents the value of the yk4dfvm7s4) .4ggo yv 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 object of mass 2.0 kg : 0 xxcn7qbw(*svsy0gmoves along the x- axis with a velocity of +4.0 m/s. A net horizontal force acting along the x-axis is applied to th7:sx c00ywx bvns*qg (e 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 moves along the +x- axis with a kint 4;btpg,p e1tdloc;0etic energy of 16.0 J. A net horizontal force acting along the x-axis is applied to the objg;tdepp;cotblt, 1 40ect 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 ah5i; l*5tfvoxc0o7a, e8zja o-s-f arnead-on collision and stick together. Body 1 has a mass of 3.5 kg and initially move5 fo-- v8;*s r azc jaoof,ax7ni0lt5es 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 ahead6+f+jx+gp/6fhfm,i pmzvgr4 c b5 tn6-on collision and stick together. Body 1 has a mass of 3.5 kg and initf+fh g x mjcbnrz/pv 664fm5,+p+gt6i ially 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.
How much kinetic energy was transformed to other kinds of energy from the collision?

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