# Problem: Blocks with masses of 3.0 kg, 4.0 kg, and 5.0 kg are lined up in a row on a frictionless table. All three are pushed forward by a 20N force applied to the 3.0 kg block.A. How much force does the 4.0 kg block exert on the 5.0 kg block?B. How much force does the 4.0 kg block exert on the 3.0 kg block?

###### FREE Expert Solution

Newton's second law:

$\overline{){\mathbf{\Sigma }}{\mathbf{F}}{\mathbf{=}}{\mathbf{m}}{\mathbf{a}}}$

The mass of the system can be calculated as follows:

M = 3.0 + 4.0 + 5.0 = 12.0 kg

From Newton's second law:

a = F/m = 20/12.0 = 1.67 m/s2

A.

FBD for each block can be drawn as follows:

For the 3.0 kg block, we have

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###### Problem Details

Blocks with masses of 3.0 kg, 4.0 kg, and 5.0 kg are lined up in a row on a frictionless table. All three are pushed forward by a 20N force applied to the 3.0 kg block.

A. How much force does the 4.0 kg block exert on the 5.0 kg block?

B. How much force does the 4.0 kg block exert on the 3.0 kg block?

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Systems of Objects: Basic concept. If you need more Systems of Objects: Basic practice, you can also practice Systems of Objects: Basic practice problems.