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Asked by Hyadarani

Aug 31, 2013

A bullet of mass 10g travelling horizontally with a velocity of 150 m/s strikes a stationary wooden block and comes to rest in 0.03 sec.Calculate the distance of penetration of the bullet into the block. Also calculate the magnitude of the force exerted by the wooden block on the bullet.

Data:

Asked by Letusknowwhy

Apr 18, 2014

Explain, why some leaves of tree may get detached from a

tree, if we vigorously shake its branch.

tree, if we vigorously shake its branch.

Answer.

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 ...

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 ...

Asked by Letusknowwhy

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?

(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?

Asked by Shailesh kumar Singh

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...

It is uniformly accelerated to v...

Asked by Upashana Pankaj

Jul 30, 2014

How to derive Newton's first law of motion from Newton's second law of motion?

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Asked by Arth

Sep 17, 2013

if action is always equal to reaction then how a horse can pull a cart ?????

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Asked by Najiha

Sep 3, 2013

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

Answer.

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 ...

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 ...

Asked by Najiha

Sep 7, 2013

State law of conservation of momentum and deduce this law from Newtons third law of motion.

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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...

Asked by Aditya

Aug 25, 2013

A 1000kg vehicle moving with a speed of 20m/s is brought to rest in a distance of 50meters find accelearation.calculate the unbalanced force acting on vehicle.

Initial velocity (u) = 20 m/s

...