The rock would be at a point 12 m from water at a time <u>4.8 s</u>.
Take the origin of the coordinate system at the top of the cliff. It is thrown upwards with a velocity u. When the rock is at a point 12 m from water, calculate the vertical displacement of the rock from the origin.
Use the equation of motion,
The rock falls under the acceleration due to gravity, directed down wards.
Substitute 18 m/s for u, -26 m for y and -9.8 m/s² for a=g.
Solve the quadratic equation for t.
Taking only the positive value,
After a time of <u>4.8 s</u> the rock would be at a distance of 12 m from water.
Answer:
A pendulum is weight suspended from a pivot so that it can swing freely
Explanation:
In order to compute correctly the sum of the two terms, we have to rewrite one of them such that they have the same exponent.
The two terms are:
For instance, we can re-write the second term such as it also has a power 
. In order to do that, we have to move the decimal point one place to the left, therefore:
At this point, the two numbers have the same exponent, so we can just add them together by adding the bases and keeping the same exponent, -2:
From our studies of the work of Professor Newton,
we have learned that
F = M a .
That is, the product of an object's mass and its acceleration
is equal to the net force acting on it.
An object in equilibrium is an object that has no acceleration.
In other words, it may be moving in a straight line at a speed
that does not change, or it may be just lying there before us.
In either case, since the object has no acceleration, we glance
at Newton's formula, and we instantly realize that the net force
on the object must be ZERO.
The object behaves just as if there were NO forces acting on it at all.
Answer:
SORRY NOONE CAN HELP YOU>>> YOU OUR A LOST CAUSE
Explanation:
sorry the photo is blocked on my computer, but that doesnt mean your a lost cause..... have a good day
