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(A) Let the mass of the lower block be $m_2 = 4\,kg$ and the upper block be $m_1 = 2\,kg$. The acceleration is $a = 2\,m/s^2$ upwards.For the lower bl

Vedclass · Accepted Answer

$T = 70.8\,N$ and $T' = 47.2\,N$

Vedclass · Answer

(A) Let the mass of the lower block be $m_2 = 4\,kg$ and the upper block be $m_1 = 2\,kg$. The acceleration is $a = 2\,m/s^2$ upwards.For the lower block $(4\,kg)$:The forces acting are tension $T'$ upwards and weight $m_2g$ downwards.Using Newton's second law: $T' - m_2g = m_2a$$T' - 4 	imes 9.8 = 4 	imes 2$$T' - 39.2 = 8$$T' = 47.2\,N$For the upper block $(2\,kg)$:The forces acting are tension $T$ upwards,tension $T'$ downwards,and weight $m_1g$ downwards.Using Newton's second law: $T - T' - m_1g = m_1a$$T - 47.2 - 2 	imes 9.8 = 2 	imes 2$$T - 47.2 - 19.6 = 4$$T - 66.8 = 4$$T = 70.8\,N$

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