3 years ago

A 500-kg car has 25,000 joules of kinetic energy. What is its speed?

Mathematics

1 answer:

Lelu [443]3 years ago

7 0

(m.v^2)/ 2 = 25000
<=> 500.v^2 = 50000
<=> v^2 = 100
<=> v = 10 m/s

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nataly862011 [7]

If the diameter is 10.5 then the radius is 5.25.
This is because the radius of a diameter is half the diameter.

So

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2 years ago

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What is the missing value in the proportion 4/5 = x/30?

ra1l [238]

Answer:

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General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Step-by-step explanation:

Step 1: Define

$\displaystyle \frac{4}{5} = \frac{x}{30}$

Step 2: Solve for x

[Multiplication Property of Equality] Cross-multiply: $\displaystyle 5x = 120$
[Division Property of Equality] Divide 5 on both sides: $\displaystyle x = 24$

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