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The centre of mass (C.M.) can be defined as a point where the mass of a body is supposed to be concentrated.For the above listed geometric shapes having a uniform mass density, the centre of mass lies at their respec...
There will not be any change in the speed of the centre of mass of the given system. The child is running arbitrarily on a trolley that is moving forward with velocity . However, the running of the child will have n...
Moment of inertia gives the measure of mass distribution about an axis.I = m1r1^2Where r1= Perpendicular distance of the i th mass from the axis of rotation.SI unit → kg-m2 Gives the measure of rotati...
· The opposing force that comes into play when one body tends to move over the surface of another, but the actual relative motion has yet not started is called Static friction.· Limiting friction is the max...
Friction is an opposing force that comes into play when one body actually moves (slides or rolls) or even tries to move over the surface of another body. Thus, the force of friction is the force that develops a...
a. a horse cannot pull a cart and run in empty space, Ans: In order to pull a cart, a horse pushes the ground backward with some force. The ground in turn exerts an equal and opposite reaction force upo...
There are two kinds of problems in classical mechanics :(a) To find unknown forces acting on a body, given the body’s acceleration. (b) To predict the future motion of a body, given the body’s initial position and vel...
It is given that,Mass of each ball =0.05 kg Initial velocity of each ball = 6 m/sMagnitude of the initial momentum of each ball, pi=0.3kgms^-1After collision, the balls change their directions of motion without changing...
It is known that, Mass of the rocket,m= 20,000 kgInitial acceleration,a=5ms^-2Acceleration due to gravity,g =10ms^-2By using Newton’s second law of motion, The net force (thrust) acting on the rocket can be written as:F-...
The mass of the box = 2.30 kgand the mass of the first gold piece = 20.15 gThe mass of the second gold piece = 20.17 gThe total mass = 2.300 + 0.2015 + 0.2017 = 2.7032 kgSince 1 is the least number of decimal places,...
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