Sunday

March 29, 2015

March 29, 2015

Posted by **robert** on Sunday, October 14, 2012 at 3:03am.

- Physics -
**Elena**, Sunday, October 14, 2012 at 11:38amAssume that the blocks accelerate to the right with acceleration ‘a’

F1 is the force acting on the block 2 by block 1, and the same force (according to the 3 Newton's Law) acts on the block 1 by the block 2.

(A) m1=m2=4.8 kg

m1•a=-F1

m2•a=F1-F(fr).

Adding two equations

a• (m1+m2)= F(fr)

a=F(fr)/(m1+m2) = 9.4/9.6 =0.98 m/s²

Net force acting on the block 1

F1= - m1•a= - 4.8•0.98= - 4.7 N

The net forces acting on block 2

F1- F(fr) = m2•a = 4.8•0.98=4.7 N

(B)

m1•a=-F1

m2•a=F1-F(fr)

Adding two equations

a• (m1+m2)= F(fr)

a=F(fr)/(m1+m2) = 9.4/9.6 =0.65 m/s²

Net force acting on the block 1

F1=-m1•a=4.8•0.6.5=3.12 N

The net forces acting on block 2

F1- F(fr) = m2•a = 9.6•0. 65=6.24 N

**Answer this Question**

**Related Questions**

PHYSICS - In Case A the mass of each block is 4.0 kg. In Case B the mass of ...

Physics - A block of mass 3m is placed on a frictionless horizontal surface, and...

Physics. - A block of mass 3m is placed on a frictionless horizontal surface, ...

Physics - Block 1, of mass m1 = 0.650kg , is connected over an ideal (massless ...

physics - a block of mass 3 kg rests on a smooth table and connected to another ...

Physics - A block of mass m = 2.00 kg rests on the left edge of a block of mass ...

Physics - A block of mass 3m is placed on a frictionless horizontal surface, and...

physics - In the Figure the pulley has negligible mass, and both it and the ...

Physics - 1. The total length of a spring is 0.25 m. What it is unstretched and ...

physics - The density of an unspecified material is 3.27 g/cm (cubed) . if the ...