(1) යම් භාජනයක අඩංගු ද්රවයක් නිසා භාජනයේ පතුල මත ඇතිවන පීඩනය 1500 Pa වේ. මෙහි "පීඩනය 1500 Pa වේ ” යනෙහි තේරුම කුමක් ද?
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Ответ:
m = mass of lawn mower = 10 kg
a = acceleration along X-direction = 3.4 m/s²
let the applied force be "F"
from the force diagram , we see that only "F Cos20 " is acting along the horizontal direction .
hence F' = net force along x-direction = F Cos20
net force along x-direction is given as
F' = ma
F Cos20 = ma
inserting the values
F Cos20 = 10 x 3.4
F Cos20 = 34
F = 36.2 N
hence the force applied is 36.2 N