Question

A 1.5 m long crowbar is pitvoted 20 cm from its tip. calculate the mechanical advantage of the crow bar if the load is at the tip
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Answer 1

Answer:

Length of crow bar = 2m

length of load arm = 0.1M

length effort arm = length of crow bar -length of load arm

=2−0.1=1.9m

so, velocity ratio = length of effort arm/length of load arm = 1.9/0.1 = 19

use formula, velocity ratio = load/effort

19 = 100kgf/effort

effort = 100/19= 5.26 kgf

hence,5.26 effort is required.

Explanation:

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