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1 The research methods that psychologists choose to use are

ek = (m·v2) / 2

v - velocity of system after the collision

m = m1 + m2

ek = (m1 + m2) ·v2/2

ek = (200 + 250) ·2,32/2 = 450·5,29/2 = 1190,25 j

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tyler's $1,000 investment will be worth $1,240 after 6 years, invested at 4% interest rate.

the problem gives the following relevant data:

principal = $1000

interest rate = 4% simple interest

term or time period = 6 years

since simple interest is given, we need to use the simple interest formula;

i = p x r x t

where: p is the principal, r is the interest rate, and t is the time the money will be invested.

i = $1000 x 4% x 6yrs

i = $1000 x 0.04 x 6

i = 40 x 6

i = 240   ==> interest earned after 6 years is $240.

total investment = principal + interest

t.i. = $1,000 + $240

t.i. = $1,240   ==> the value of tyler's investment after 6 years.

explanation: