
Concept explainers
(a)
The formula for
(a)

Answer to Problem 17PPS
Explanation of Solution
Given information:
The equation:
Concept Used:
- To get rid of a number in addition from one side, subtract the same number from both sides of equal sign.
- To get rid of a number in subtraction from one side, add the same number both sides of equal sign.
- To get rid of a number in multiplication from one side, divide the same number from both sides of equal sign.
- To get rid of a number in division from one side, multiply the same number both sides of equal sign.
Rules of Addition/ Subtraction:
- Two numbers with similar sign always get added and the resulting number will carry the similar sign.
- Two numbers with opposite signs always get subtracted and the resulting number will carry the sign of larger number.
Rules of Multiplication/ Division:
- The product/quotient of two similar sign numbers is always positive.
- The product/quotient of two numbers with opposite signs is always negative.
Calculation:
In order to solve the formula for vf, first multiply both sides by t and then add both sidesvito simplify further as shown below:
Thus, the formula is
(b)
To find the final velocity of a runner.
(b)

Answer to Problem 17PPS
Explanation of Solution
Given:
CALCULATION:
Thus, the value of final velocity is
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