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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...
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-...
Impulse It is given by the product of force and time. As force is a vector quantity, its product with time gives a vector quantity.
Scalar: Mass, volume, density, angular frequency, number of moles, speed.Vector: Acceleration, angular velocity, velocity, displacement.A scalar quantity is specified by its magnitude. Mass, volume, density, angular fre...
We know that instantaneous velocity is the first derivative of distance with respect to time.Here, the time interval is so small that it is assumed that the particle does not change its direction of motion. Therefore,...
a. with zero speed at an instant may have non-zero acceleration at that instantAns: The above statement is true. When an object is thrown vertically up in the air, its speed becomes zero at maximum height. It has acce...
a. What is the direction of acceleration during the upward motion of the ball?Ans: Acceleration of the ball (which is actually acceleration due to gravity) always acts in the downward direction towards the centre of t...
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