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A 100kg mass is pulled along a frictionless surface by a horizontal force such that its acceleration is 6m/s2?

"A 100 kg mass is pulled along a frictionless surface by a horizontal force F such that its acceleration is 6.0 m/s2. A 20 kg mass slides along the top of the 100 kg mass and has an acceleration of 4.0 m/s2. (It thus slides backward relative to the 100 kg mass.)

 

(a) What is the frictional force exerted by the 100 kg mass on the 20 kg mass?

(b) What is the net force acting on the 100 kg mass?

What is the force F?

(c) After the 20 kg mass falls off the 100 kg mass, what is the acceleration of the 100 kg mass? (Assume that the force F does not change.)"

Answers (6)

doggy 05-03-2013
== 1µC
Comment 
shantanu_85 07-05-2013
"A 100 kilogram mass can be pulled along a frictionless surface area with a horizontally force Y in ways that its acceleration is actually 6.1 meters/s2. A something like 20 kilogram aggregate slides across the the surface of the a hundred kilo aggregate and has a great speeding of three.1 m/s2. (The item thence photo slides backward in accordance with your c kilo bulk.) "
Comment 
vishu 16-05-2013
"- Employment carried out = force x mileage migrated in direction of the particular drive "
Comment 
panchali 21-05-2013
            "Friction and weight are common experiences and taken for granted, but were not always understood. Aristotle believed that objects that contained earth fell because in Earth was at the center of the universe, and that was the natural order of things. We now know that weight, which is the force of gravity between objects, not only makes apples fall from trees, but keeps the Moon circling the Earth, and the Earth circling the sun. Aristotle also believed (and some students still believe) that the natural state of an object is to be at rest. That is, without a force pushing it, an object will slow down to a stop. This view overlooks friction, which is the force that causes most objects we see to come to rest. Now we know that there is nothing pushing planets along their orbit, and that without gravity to hold them in orbit, they would continue to move in a straight line until interfered with.           "
Comment 
honda-civic 28-05-2013
    On the Planet's area, objects drop in hunting for.8 thousand/azines/utes. In the event oxygen resistance is actually minimal then somberness will be the solely pressure performing on this falling physical object.
Comment 
gargg 31-05-2013
    "Declares which strength can certainly neither be made not really wrecked but not possibly be developed from a single type directly into yet another without the need of alter in their complete sum.           "
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