In figure ( a ) a constant horizontal force F a is applied to block A , which pu

Question

In figure (a) a constant horizontal force Fa is applied to block A, which pushes against block B with a 26.0 N force directed horizontally to the right. In figure (b), the same forceFa is applied to block B; now block A pushes on block B with a 13.0 N force directed horizontally to the left. The blocks have a combined mass of 15.0 kg.

In figure (a) a constant horizontal force Fa is applied to block A, which pushes against block B with a 26.0 N force directed horizontally to the right. In figure (b), the same forceFa is applied to block B; now block A pushes on block B with a 13.0 N force directed horizontally to the left. The blocks have a combined mass of 15.0 kg.

Explanation / Answer

a)

for B ..

26 = m_B * a

for A

13 = (15-m_B) *a

so.. 13 = 15a - m_B*a

so.. 13 = 15a - 26

so.a = 2.6 m/sec2

b) Fa = 26+13 = 39 N

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