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What is the velocity ratio of a block and tackle system with six pulleys if an effort of 2000 N is required to raise a load of 5000 N downward?

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Important Questions on Simple Machine

EASY
Science>Physics>Simple Machine>Velocity Ratio
With reference to the terms Mechanical Advantage, Velocity Ratio and efficiency of a machine, name and define the term that will not change for a machine of a given design.
EASY
Science>Physics>Simple Machine>Velocity Ratio
The mechanical advantage of a machine is 5 and its efficiency is 80%. It is used to lift a load of 200 kgf to a height of 20 m.  
Calculate: (i) The effort required, and (ii) The work done on the machine (g=10 ms-2).
HARD
Science>Physics>Simple Machine>Velocity Ratio
An effort of 500 N is applied through a distance of 0.50 m on a machine, whose efficiency is 90% such that resistance is overcome through a distance of 0.04 m. Calculate: -
 (i) velocity ratio,
 (ii) mechanical advantage,
 (iii) resistance overcome by the machine.
EASY
Science>Physics>Simple Machine>Velocity Ratio

The given figure shows a simple lever. What is the velocity ratio?

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EASY
Science>Physics>Simple Machine>Velocity Ratio
Define velocity ratio of a machine. Why does the velocity ratio have no unit?
EASY
Science>Physics>Simple Machine>Velocity Ratio
The velocity ratio (VR) for a machine is
 
EASY
Science>Physics>Simple Machine>Velocity Ratio
The velocity ratio of a single fixed pulley is always more than one.
EASY
Science>Physics>Simple Machine>Velocity Ratio
What is the velocity ratio of a single fixed pulley?
EASY
Science>Physics>Simple Machine>Velocity Ratio
The mechanical advantage of a machine is 5 and its efficiency is 80%. It is used to lift a load of 200 kgf to a height of 20 m. Calculate the work done on the machine. (g=10 ms-2)
EASY
Science>Physics>Simple Machine>Velocity Ratio
A block and tackle system has 5 pulleys. If an effort of 1000 N is needed in the downward direction to raise a load of 4500 N, calculate the velocity ratio.
MEDIUM
Science>Physics>Simple Machine>Velocity Ratio
A machine uplifts a load of 100 N by 10 cm. In this process it requires 80 N of effort with downward displacement of 15 cm. Calculate the velocity ratio.
EASY
Science>Physics>Simple Machine>Velocity Ratio
Define the term velocity ratio.
MEDIUM
Science>Physics>Simple Machine>Velocity Ratio
What quantity is equal to the total number of stands of tackle supporting the load?
MEDIUM
Science>Physics>Simple Machine>Velocity Ratio
A system of pulleys consists of three fixed and two movable pulleys. How much effort has to move down to lift the load to a distance of 2 m, if the efficiency of the system is 70%?
HARD
Science>Physics>Simple Machine>Velocity Ratio

Define the following:
Velocity ratio

HARD
Science>Physics>Simple Machine>Velocity Ratio
An effort of 500 N is applied through a distance of 0.50 m on a machine, whose efficiency is 90% such that resistance is overcome through a distance of 0.04 m. Calculate mechanical advantage.
EASY
Science>Physics>Simple Machine>Velocity Ratio
Define the term velocity ratio, state its unit.
EASY
Science>Physics>Simple Machine>Velocity Ratio
What is the velocity ratio of a single movable pulley?
EASY
Science>Physics>Simple Machine>Velocity Ratio
Define the term velocity ratio, state its unit.
EASY
Science>Physics>Simple Machine>Velocity Ratio
A machine uplifts a load of 100 N by 10 cm. In this process it requires 80 N of effort with downward displacement of 15 cm. Calculate the work input.