Answer:592 kJ
Explanation:
Given
mass of elevator m=1500 kg
Lifting height=40 m
Friction Force F=100 N
The cable has to work against gravitational force and friction Force
Increase in Potential Energy of Elevator
thus work done by gravitational force
Work done against friction force
Total Work done by the cable
Answer:
c)Average acceleration is always equal to the change in velocity of an object divided by the time interval.
Explanation:
Because average acceleration= a2+a1/2
Which is equal to change in velocity which is a time rate of change of velocity v-u/t which actually explains average acceleration
Mass extinction occur from natural disasters, such as a n asteroid hitting earth or a volcano errupting and spread ash everywhere.
It makes sense to measure geologic time between mass extinctions because after each mass extinction, there is almost no life left and the few left have to repopulate, which may lead way to new mutations and new varieties of plants and animals.
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Hey there!
Here is your answer:
<u><em>The proper answer to this question is a "igneous rock".</em></u>
Reason:
<u><em>Metamorphic rock: Formed by heat and pressure under the Earths crust.</em></u>
<u><em>Sedimentary rock: Formed by deposition in rivers and pressure causes the rocks to compact.</em></u>
<u><em>Igneous rock: The cooling of lava and it crystalizes.</em></u>
<em>Therefore the answer is Igneous rock.</em>
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit