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Aug 31, 2013



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Apr 18, 2014

#### Explain, why some leaves of tree may get detached from atree, if we vigorously shake its branch.



Leaves of tree may get detached from a tree, if we vigorously shake its branch due to inertia of rest. Leaves are in the state of rest with respect to the tree so they possess inertia of ...

Apr 18, 2014

#### 1 Which of the following has more inertia :  (a) A rubber ball and a stone of the same size?   (b) A bicycle and a train?   (c) A five rupees coin and one rupee coin?



Which of the following has more inertia?
(a) A rubber ball and a stone of the same size?
(b) A bicycle and a train?
(c) A five-...

Aug 16, 2013

#### Derive Newton's  second law of motion?



Suppose an object of mass, m is moving along a straight line with an initial velocity, u.
It is uniformly accelerated to v...

Jul 30, 2014



Sep 17, 2013



Sep 3, 2013

#### Why does an athlete run some distance before taking a jump. State the law behind it.



This is based on Newton's third law of motion. When the athlete runs a distance he/she pushes the ground with a large force (action) and so the ground also pushes the athlete with an ...

Sep 7, 2013



#### Why is it advised to tie any luggage kept on a roof of a bus with a slope?



When the bus stops suddenly, the luggage on the roof top will fall forward due to inertia of motion. Similarly when the bus starts the luggage will fall backwards due to inertia of rest. To avoid this, any lugg...