Crawfordkyira100idn
Answered

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Andrew measured the time it took for an apple to fall 50 feet as 1.95 seconds, but his calculations show that it should be 1.77 seconds. What was his experimental error?

Sagot :

Younglargeamountidn

Answer about 1.77 seconds.

f(t) = -16 t^2 + 25t + 6

f(t) = height.

hieght = 0 = -16t^2 + 25t + 6

Find t using the quadratic formula,

t = ( - 25 +/- √[25^2 - 4 (-16)(6)] ) / [2*(-16)]

t = [-25 +/- √ (625 + 384) ] / -32

t = [-25 +/- 31.76] / -32.

You will obtain two results one positive and one negative. Take the positive only as the other one has no physical meaning. t = 1.77 s.

Gimmywithajidn

Answer:The given problem is : −4.5 + 4.2 + 5.6 − 7.3

The order for solving an arithmetic problem is as follows :

Parentheses,

Exponentiation,

Multiplication,

Addition,

Subtraction,

We can rewrite the given problem as : 4.2 + 5.6 - 7.3 - 4.5

Taking 4.2 and 5.6 together in bracket : (4.2 + 5.6) - 7.3 - 4.5

= 9.8 - 7.3 - 4.5

= 2.5 - 4.5

= -2

Hence, the answer for given problem is -2, but Andrew get -21.6 which is wrong.

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