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covers a distance of a of 20m before coming to rest. find the the opposing force.
Hailstones with an average mass of 4 g fall vertically and strike a flat roof at 12 m/s. In a period of 5 minutes 6000 hailstones fall on each square meter of roof and rebound vertically at 3 m/s. Calculate the force on the roof if it has and area of 30 m2
The answer is 36N
the same maximum bending stress when a rectangular beam section is
1) Doubled in breadth, and 2) Doubled in depth.
inclined plane = 40
mass 1 = 15.6kg
mass 2 = m
(2)Avg. velocity b/w t=2s and t=3s (3)instantaneous acceleration