Question

6. Needle
In a lever, fulcrum is at one end at a distance of 30 cm from the load and effort is at the other end at a
distance of 90 cm from the load. Find:
(a) the length of load arm,
(b) the length of effort arm, and
(c) the mechanical advantage of the lever​

Answer 1

Answer:

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Explanation:

(a) Length of Load Arm is 30 cm. (given)

(b) Length of Effort Arm = Length of fulcrum

                                        = 90 cm + 30 cm

                                        = 120 cm

(c) Mechanical Advantage of lever = $\frac{Effort Arm}{Load Arm}$

                                                         = $\frac{120 cm}{30 cm}$

                                                         = 4