Question

A wheel barrow is used to carry a load of 200N by applying an effort of 100N.
The effort distance is 125cm and the load distance is 50cm. Find its MA, VR, and efficiency

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Answer 1

Answer:

Explanation:

MA = load / Effort = 200/100 = 2

Answer 2

Answer:

A wheelbarrow is used to carry a load of 200N by applying an effort of 100N.  The effort distance is 125cm and the load distance is 50cm. Its

1. Mechanical advantage = $2$
2. Velocity ratio = $2.5$
3. Efficiency = $80\%$

Explanation:

• The mechanical advantage, velocity ratio, and efficiency of a machine can be expressed as,

        $\text{ { Mechanical\ advantage }(M . A)}=\frac{\text { Load }}{\text { Effort }} = \frac{L}{E}$    ...(1)

        $\text { Velocity ratio }(\text { V.R })=\frac{E_{d}}{L_{d}}$         ...(2)

        $\text { Efficiency}\ (\eta) = \frac{\text { M.A }}{\text { V.R } }$                  ...(3)

Where,

   L   -    Load

   E   -   Effort

   $L_d$  -   Load distance

   $E_d$  -   Effort distance

In the question, it is given that,

$L = 200\ N$                                  $E = 100\ N$            

$L_d = 50\ cm=0.5\ m$                   $E_d = 125\ cm = 1.25\ m$  

M.A can be obtained by substituting these values into equation (1)

$\text M \cdot \text A=\frac{200}{100}=2$

V.R  can be obtained by substituting the values of $E_d$ and $L_d$ into equation (2)

$\text V \cdot \text R =\frac{1.25}{0.5}=2.5$

Efficiency,

$\eta = \frac{2}{2.5} \times 100 = 80 \%$