Question

a crowbar of 2m is used to lift an object of 800N. If the effort arm is 160 cm,calculate the effort applied ​

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.

Answer 2

Answer:

Explanation:convert 2m into cm by divided by 2 and use it's formula l.ld=E.Ed