Question

a lever of length 9cm has its load arm 5cm long and effort arm is 9cm long. what is the M.A and V.R if the efficiency is 100%?

Answer 1

Answer:

The mechanical advantage and the velocity ratio is 1.8 and 1.8

Explanation:

Given that,

length l = 9 cm

load arm = 5 cm

effort arm = 9 cm

efficiency = 100%

The mechanical advantage is defined as:

$M.A =\dfrac{effort\ arm}{load\ arm}$

$M.A=\dfrac{9}{5}$

$M.A=1.8$

The velocity ratio is

The efficiency is defined as:

$\eta=\dfrac{M.A}{V.R}$

$V.R=\dfrac{M.A}{\eta}$

$V.R=\dfrac{1.8\times 100}{100}$

$V.R = 1.8$

Hence, The mechanical advantage and the velocity ratio is 1.8 and 1.8

Answer 2

Answer:

The mechanical advantage and the velocity ratio is 1.8 and 1.8

Explanation:

Given that,

length l = 9 cm

load arm = 5 cm

effort arm = 9 cm

efficiency = 100%

The mechanical advantage is defined as:

The velocity ratio is

The efficiency is defined as:

Hence, The mechanical advantage and the velocity ratio is 1.8 and 1.8