A truck of mass M is moved under a force F. If the truck is then loaded with an object equal to the mass of the truck and the driving force is halved, then how does the acceleration change?
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The gravitational force between two objects is F. If masses of both objects are halved without changing distance between them,
gravitational force between two objects is (a) F/4
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A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal
The work down by the gravitational force acting on the body is zero because the direction of force is vertically downward and the displacement is horizontal i.e. force and displacement...
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An object of mass, m is moving with a constant velocity, v. How much work should be done on the object in order to bring the object to rest?
The object is in motion, so its energy = kinetic energy = 1 /2 mv2 The kinetic energy of the object, when it comes to rest = 0. Work done on object...
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An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity?
Yes. Even when an object experiences a net zero external unbalanced force, it is possible that the object is travelling with a non-zero velocity. This is possible only when the...
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According to the third law of motion when we push on an object, the object pushes back on us with an equal and opposite force.
The truck has a large mass. Therefore, the static friction between the truck and the road is also very high. To move the car, one has to apply a force...
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Under what condition(s) is the magnitude of average velocity of an object equal to its average speed?
If the motion of an object is along a straight line and in the same direction, the magnitude of displacement is equal to the total path length. In that case, the...
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Under what condition(s) is the magnitude of average velocity of an object equal to its average speed?
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An object has moved through a distance. Can it have zero displacement? If yes, support your answer with an example.
Yes, zero displacement is possible if an object has moved through a distance. Suppose a body is moving in a circular path and starts moving from point A and it...
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In which of the following cases of motions, the distance moved and the magnitude of displacement are equal?
(a) If the car is moving on straight road
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A student says that he had applied a force F = k√x on a particle and the particle moved in simple harmonic motion.
(a) As x increases k increases. Explanation: Since the motion is simple harmonic, the force F=-⍵²x where ⍵² is a constant. Equating the force applied by the student we get, -k/x=-⍵²x →k=⍵²x² It is...
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