coollid876

10.03.2021 • 

Physics

A plank AB 3.0 m long weighing 20 kg and with its centre of gravity 2.0 m from the end A
carries a load of mass 10 kg at the end 4. It
rests on two supports at C and D as shown in
RA
B В
4
50 cm
50 cm
(1) Compute the values of the reaction
forces R; and R, at Cand D.
How far from D. and on which side of it,
must a mass of 24 kg be placed on the
plank so as to make the reactions equal?
What are their values?
(m) Without this 24 kg, what vertical force
applied at B will just lift the plank clear 30
of D? What is then the reaction at C?​

Ответ:

hmskevinjacobo5471

10.03.2021

Physics

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You haven't shown us the list of choices, so it's really really hard to help you choose the best one.

The object's size, color, temperature, age, or cost have no effect at all on it's potential or kinetic energy.

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