Why Does a Block Accelerate Even When Forces Are Equal?

[mr newtein]

two blocks are connected by string if i pull a block,then block(it will transmit force) will also pull string then,string will also pull block (a& r pairs)forces on block are by me and by string of equal magnitude than why is block accelerating

 

[nasu]

two blocks are connected by string if i pull a block,then block(it will transmit force) will also pull string then,string will also pull block (a& r pairs)forces on block are by me and by string of equal magnitude than why is block accelerating

The force from the string on the block is not necessarily equal to your force on the block.

 

[jedishrfu]

common layman's usage is:

I apply a force on a block and it moves.

but for physics you need to think this way:

I apply a force (f=ma) on a block of mass m and it accelerates (no friction case).

in the real world with friction:

I apply a force (f=ma) on a block of mass m and it accelerates to some constant
speed because the frictional force increases with increasing speed and opposes the
force I am applying.

 

[mr newtein]

common layman's usage is:

I apply a force on a block and it moves.

but for physics you need to think this way:

I apply a force (f=ma) on a block of mass m and it accelerates (no friction case).

in the real world with friction:

I apply a force (f=ma) on a block of mass m and it accelerates to some constant
speed because the frictional force increases with increasing speed and opposes the
force I am applying.

i am not getting it

 

[mr newtein]

The force from the string on the block is not necessarily equal to your force on the block.

why? it because,the block may not transferring all force i am applying.