<span>Metric
======
60 miles / hour = 60 * [1 hour / 3600 sec] * [1.6 km/1 mile]*[1000 m / 1 km]
60 miles / hour = 26.67 m/s
By similar methods 75 mph = 33.33 m/s
145 grams = 145 / 1000 = 0.145 kg Why 1000
F = m*(v1 - v2)/ t I'll let you figure out why v2 is minus. Think about which way the ball is going.
F = 0.145 kg (26.67 - (- 33.33) ) / 0.1 second
F = 87 N
English
======
m = 0.145 kg * 2.2 = 0.319 pounds (mass)
60 mph = 88 feet per second.
75 mph = 75 * 5280 / 3600 = 110 feet / second
F = 0.319 * (88 - - 110)/0.1
F = 631 poundals.</span>
According to Jean Piaget, unrealistic idealism often occurs in adolescence as a result of egocentrism. Egocentrism is defined as the inability to understand or comprehend any point of view other than their own. Piaget claimed that adolescents are egocentric and are only seeing the world only from their personal point of view.
Answer:
v ≈ 4.47
Explanation:
The Formula needed = <u>KE = </u>
<u> m v²</u>
<u></u>
Substitute with numbers known:
2000J = × 200kg × v²
Simplify:
÷100 ÷100 (Divide by 100 on both sides)
2000J = 100 × v²
= v²
20 = v²
√ √ (Square root on both sides)
√20 = √v²
4.472135955 = v (Round to whatever the question asks)
v ≈ 4.47 (I rounded to 2 decimal places or 3 significant figures, as that is what it usually is)
