Answer:
F = 35651 [N]
Explanation:
To solve this problem we must use Newton's second law, which tells us that the sum of forces is equal to the product of mass by acceleration.
But first, we must use the following equation of kinematics to find acceleration.
where:
Vf = final velocity = 185 [m/s]
Vi = initial velocity = 0 (the cannon ball is at rest in the first moment)
a = acceleration [m/s²]
x = distance = 3.6 [m]
Now replacing these values into the equation:
(185)² = 0² + (2*a*3.6)
34225 = 7.2*a
a = 34225/7.2
a = 4753.5 [m/s²]
Now using Newton's second law we have:
F = m*a
where:
F = force [N]
m = mass = 7.5 [kg]
F = 7.5*4753.5
F = 35651 [N]
Mass of object/source
Gravity
Fg=mg
Explanation:
Below is an attachment containing the solution.
The correlation between two observed variables is -0.84. from this, it can be concluded that the relationship between the two variables is strong but inverse (opposite direction).
<h3>What is correlation?</h3>
Correlation is one of the several measures of the linear statistical relationship between two random variables, indicating both the strength and direction of the relationship.
The correlation coefficient denoted by r is used to measure the strength and direction of a linear relationship between two random variables. of two variables.
The r value is between 0 and 1 and the closer to 1 indicates the strength of the relationship Also, when the r is negative, it is an indication that both variables move in the opposite direction.
Therefore, the correlation between two observed variables is -0.84. from this, it can be concluded that the relationship between the two variables is strong but inverse.
Learn more about correlation at: brainly.com/question/15577278
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