a block of mass 4kg is suspended through two light spring

A block of mass $$4\,kg$$ is suspended through two light spring balances $$A$$ and $$B.$$ Then $$A$$ and $$B$$ will read respectively :
Laws of Motion mcq question image

A. $$4\,kg$$ and zero $$kg$$

B. zero $$kg$$ and $$4\,kg$$

C. $$4\,kg$$ and $$4\,kg$$

D. $$2\,kg$$ and $$2\,kg$$

Answer : $$4\,kg$$ and $$4\,kg$$

Solution :
In series each spring will have same force. Here it is $$4\,kg-wt.$$

Releted MCQ Question on
Basic Physics >> Laws of Motion

Releted Question 1

A ship of mass $$3 \times {10^7}\,kg$$ initially at rest, is pulled by a force of $$5 \times {10^4}\,N$$ through a distance of $$3m.$$ Assuming that the resistance due to water is negligible, the speed of the ship is

A. $$1.5 m/sec.$$

B. $$60 m/sec.$$

C. $$0.1 m/sec.$$

D. $$5 m/sec.$$

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Releted Question 2

The pulleys and strings shown in the figure are smooth and of negligible mass. For the system to remain in equilibrium, the angle $$\theta $$ should be

A. $${0^ \circ }$$

B. $${30^ \circ }$$

C. $${45^ \circ }$$

D. $${60^ \circ }$$

View Answer

Releted Question 3

A string of negligible mass going over a damped pulley of mass $$m$$ supports a block of mass $$M$$ as shown in the figure. The force on the pulley by the clamp is given by

A. $$\sqrt 2 \,{\text{Mg}}$$

B. $$\sqrt 2 \,{\text{mg}}$$

C. $$\sqrt {{{\left( {M + m} \right)}^2} + {m^2}} g$$

D. $$\sqrt {{{\left( {M + m} \right)}^2} + {M^2}} g$$

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Releted Question 4

The string between blocks of mass $$m$$ and $$2m$$ is massless and inextensible. The system is suspended by a massless spring as shown. If the string is cut find the magnitudes of accelerations of mass $$2m$$ and $$m$$ (immediately after cutting)

A. g, g

B. $$g,\frac{g}{2}$$

C. $$\frac{g}{2},g$$

D. $$\frac{g}{2},\frac{g}{2}$$

View Answer

A block of mass $$4\,kg$$ is suspended through two light spring balances $$A$$ and $$B.$$ Then $$A$$ and $$B$$ will read respectively :

Releted MCQ Question on
Basic Physics >> Laws of Motion

A ship of mass $$3 \times {10^7}\,kg$$ initially at rest, is pulled by a force of $$5 \times {10^4}\,N$$ through a distance of $$3m.$$ Assuming that the resistance due to water is negligible, the speed of the ship is

The pulleys and strings shown in the figure are smooth and of negligible mass. For the system to remain in equilibrium, the angle $$\theta $$ should be

A string of negligible mass going over a damped pulley of mass $$m$$ supports a block of mass $$M$$ as shown in the figure. The force on the pulley by the clamp is given by

The string between blocks of mass $$m$$ and $$2m$$ is massless and inextensible. The system is suspended by a massless spring as shown. If the string is cut find the magnitudes of accelerations of mass $$2m$$ and $$m$$ (immediately after cutting)

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Laws of Motion

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A block of mass $$4\,kg$$ is suspended through two light spring balances $$A$$ and $$B.$$ Then $$A$$ and $$B$$ will read respectively :

Releted MCQ Question on Basic Physics >> Laws of Motion

A ship of mass $$3 \times {10^7}\,kg$$ initially at rest, is pulled by a force of $$5 \times {10^4}\,N$$ through a distance of $$3m.$$ Assuming that the resistance due to water is negligible, the speed of the ship is

The pulleys and strings shown in the figure are smooth and of negligible mass. For the system to remain in equilibrium, the angle $$\theta $$ should be

A string of negligible mass going over a damped pulley of mass $$m$$ supports a block of mass $$M$$ as shown in the figure. The force on the pulley by the clamp is given by

The string between blocks of mass $$m$$ and $$2m$$ is massless and inextensible. The system is suspended by a massless spring as shown. If the string is cut find the magnitudes of accelerations of mass $$2m$$ and $$m$$ (immediately after cutting)

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