Forces in Connected Systems of Objects Video Lessons

Video Thumbnail

Concept

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:

ΣF=ma

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

81% (40 ratings)
View Complete Written Solution
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?

Frequently Asked Questions

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 Forces in Connected Systems of Objects concept. You can view video lessons to learn Forces in Connected Systems of Objects. Or if you need more Forces in Connected Systems of Objects practice, you can also practice Forces in Connected Systems of Objects practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Ford's class at TAMU.