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ICSE Class 9 Answered

A load of 20kg weight is suspended at one end of lower which is pivoted on a fulcrum at the other end , as shown in the given figure. The effort (P) (in N). if we apply the effort at the center of lever to balance it , should be       (g-20m s)
question image
Asked by krashish57 | 14 Sep, 2023, 11:05: AM
answered-by-expert Expert Answer
To lift the load using effort P at middle of lever , counterclockwise moment of P with respect to
fulcrum should be greater than the clockwise moment of load .
Load W = m g = 20*9.8 = 196 \ N
Hence we get
begin mathsize 14px style P space cross times space l over 2 space equals space W space cross times l end style
Hence P = 2 W = 2 × 196 N = 392 N
Answered by Thiyagarajan K | 15 Sep, 2023, 04:02: PM
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