(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A block of mass m1 = 2 kg and a block of mass m2 = 3 kg are tied together and are pulled from rest across the floor by a force of Fp = 25 N. The coefficient of friction of the blocks with the floor is µ = 0.3.

a) What is the acceleration of the two blocks? Answer: 2.06m/s^2

b) What is the tension in the string between the blocks?

2. Relevant equations

For a) F=ma

For b) F=ma

3. The attempt at a solution

a) m=5 and a=9.8 the answer was 49. I then multiplied 49 by 0.3 to get 14.7N. 14.7N was then subtracted from 25N to get 10.3N. 10.3N was then divided by 5 to get 2.06m/s^2.

b) Each block sould be calculated seperatley. Block m1 is 2kg and block m2 is 5kg. They are being pulled to the right with T (tension) between m1 and m2. Each block has different normal forces, m1=2 and m2=5. I used F=ma: 2(9.8)=19.6N and 5(9.8)=49N.

The front block will have friction, the pulling force, and the tension of the rope acting on it. The back block will only have the tension of the rope and friction. Both will have an acceleration, a.

Any help is much appreciated!

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# Homework Help: Blocks on Floor - Tension between blocks

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