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What people are asking?

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.



This answer has an image. Please click on the question to read more.

Najiha

Sep 3, 2013

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



An athlete runs a certain distance  to gain momentum before taking a long jump. This is because velocity acquired by running is added to the velocity of the athlete at the tim...

Letusknowwhy

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 ...

Upashana Pankaj

Jul 30, 2014

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



According to Newton's second law:
Force applied on a body is equal to the product of mass and acceleration of the bo...

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?



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-...

Arth

Sep 17, 2013

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



A horse applies a force on the ground by their feet in a backward direction while running. According to Newton’s third law of motion, an equal reaction force can be exerted ...

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...

Najiha

Sep 7, 2013

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



This answer has an image. Please click on the question to read more.

Veena Pinto

Aug 18, 2015

#### 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...

Prem Sidharth

Sep 16, 2015

#### derive f=ma



This answer has an image. Please click on the question to read more.

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.



This answer has an image. Please click on the question to read more.

Najiha

Sep 3, 2013

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



An athlete runs a certain distance  to gain momentum before taking a long jump. This is because velocity acquired by running is added to the velocity of the athlete at the tim...

Letusknowwhy

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 ...

Upashana Pankaj

Jul 30, 2014

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



According to Newton's second law:
Force applied on a body is equal to the product of mass and acceleration of the bo...

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?



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-...

Arth

Sep 17, 2013

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



A horse applies a force on the ground by their feet in a backward direction while running. According to Newton’s third law of motion, an equal reaction force can be exerted ...

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...

Najiha

Sep 7, 2013

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



This answer has an image. Please click on the question to read more.

Veena Pinto

Aug 18, 2015

#### 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...

Prem Sidharth

Sep 16, 2015

#### derive f=ma



This answer has an image. Please click on the question to read more.

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