a bar of length l and uniform density is held horizontally against a wall by a
pivot at one end and a rope of tension t which pulls up and to the left
making an angle with the vertical wall. the rope is attached to the bar at
a distance i = l from the wall. a mass m is resting at the end of the bar.
if the bar has total mass 2.3kg, the mass m=2.0kg, and the rope makes an
angle of 32.6' with the wall, what is the magnitude of the force exerted on
the bar by the pivot |fpivot| answer in newtons (n).

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

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1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.