W 20.
An iron block of mass 10 kg rests on a wooden plane inclined at 30°
to the horizontal. It is found that the least force parallel to the plane
which causes the block to slide up is 100 N. Calculate the coefficient
of friction between the two surfaces.
|NEB 2076]​

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below. your friend goes first, and you follow after he has dropped a distance of 2.0m. when your friend hits the water, is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

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J. j. thomson’s experiment disproved the theory that an atom