Three Blocks 123456 Three blocks pushed to the right by hand Three blocks, each

Question

Three Blocks 123456 Three blocks pushed to the right by hand Three blocks, each of mass 13 kg are on a frictionless table. A hand pushes on the left most box (A) such that the three boxes accelerate in the positive horizontal direction as shown at a rate of a = 0.5 m/s2. 1) What is the magnitude of the force on block A from the hand? N Submit 2) What is the net horizontal force on block A ? N Submit 3) What is the horizontal force on block A due to block B? N Submit 4) What is the net horizontal force on block B? N Submit 5) What is the horizontal force on block B due to block C? N Submit

Explanation / Answer

Given m=13 kg

a=0.5 m/s2.

1) the magnitude of the force on block A from the hand is

F = 3ma = 19.5 N

2) the net horizontal force on block A is

Fa = ma

= 13 x 0.5

= 6.5 N

3) the horizontal force on block A due to block B is

19.5 - Fb = 6.5

Fb = 13 N

4) the net horizontal force on block B is

Fb = 6.5 N

5) the horizontal force on block B due to block C is

Fc = 13 - 6.5

= 6.5 N

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