Two masses of 4 kg and 5 kg are connected by a string passing through a frictionless pulley and are kept on a frictionless table as shown in the figure. The acceleration of 5 kg mass is

1. 49 m/s²

2. 5.44 m/s²

3. 19.5 m/s²

4. 2.72 m/s²

Two masses 2 kg and 3 kg are attached to the end of the string passed over a pulley fixed at the top. The tension and acceleration are

1. $\frac{7g}{8};\frac{g}{8}$

2. $\frac{21g}{8};\frac{g}{8}$

3. $\frac{21g}{8};\frac{g}{5}$

4. $\frac{12g}{5};\frac{g}{5}$

Three blocks A, B and C weighing 1, 8 and 27 kg respectively are connected as shown in the figure with an inextensible string and are moving on a smooth surface. T₃ is equal to 36 N. Then T₂ is 

(1) 18 N

(2) 9 N

(3) 3.375 N

(4) 1.25 N

Two bodies of mass 3 kg and 4 kg are suspended at the ends of massless string passing over a frictionless pulley. The acceleration of the system is (g = 9.8 m/s²) 

(1) 4.9 m/s²

(2) 2.45 m/s²

(3) 1.4 m/s²

(4) 9.5 m/s²

Three solids of masses m₁, m₂ and m₃ are connected with weightless string in succession and are placed on a frictionless table. If the mass m₃ is dragged with a force T, the tension in the string between m₂ and m₃ is 

(1) $\frac{m_2}{m_1+m_2+m_3}T$

(2) $\frac{m_3}{m_1+m_2+m_3}T$

(3) $\frac{m_1+m_2}{m_1+m_2+m_3}T$

(4) $\frac{m_2+m_3}{m_1+m_2+m_3}T$

Three blocks of masses m₁, m₂ and m₃ are connected by massless strings as shown on a frictionless table. They are pulled with a force T₃ = 40 N. If m₁ = 10 kg, m₂ = 6 kg and m₃ 4 kg, the tension T₂ will be 

(1) 20 N

(2) 40 N

(3) 10 N

(4) 32 N

A light string passes over a frictionless pulley. To one of its ends a mass of 6 kg is attached. To its other end a mass of 10 kg is attached. The tension in the thread will be 

(1) 24.5 N

(2) 2.45 N

(3) 79 N

(4) 73.5 N

Two masses of 5kg and 10kg are connected to a pulley as shown. What will be the acceleration of the system (g = acceleration due to gravity)

(1) g

(2) $\frac{g}{2}$

(3) $\frac{g}{3}$

(4) $\frac{g}{4}$

A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is (given g = 10 ms^–2) 

(1) 100 ms^–2

(2) 3 ms^–2

(3) 10 ms^–2

(4) 30 ms^–2

Three blocks of masses 2 kg, 3 kg and 5 kg are connected to each other with light string and are then placed on a frictionless surface as shown in the figure. The system is pulled by a force F = 10 N, then tension T₁ = 

(1) 1N

(2) 5 N

(3) 8 N

(4) 10 N