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So today we will be going over the question 4.2 example 1. The question is, what is
the force of gravity on a 700 kg cow? First we have to list what we are given. We are
given the mass of the cow, which is 700 kg, and we given the acceleration of gravity
with is 9.8 meters per second squared. Now here we have the image of the cow and
the only force that is acting on the cow is the force of gravity, which is where we can
see the arrow pointing downwards. Nest, we have to find the equation. So we use
the force of gravity equals mass times acceleration of gravity, which represented
here with g. next we plug in the numbers. So 700 kg times 9.8 meters per second
squared and round to one sig fig, will equal 7 time 10 to the power of 3 newtonŐs.
So finally we do the unit check so we use the initial equation we used which is the
force of gravity equals m times g. And now we plug in the units. So newtonŐs equals
kilograms times meters per second squared.