1/5 of the class you multiply the fractions and simplify it
Answer:
- KEi = 2.256×10^5 J
- KEf = 9.023×10^5 J
- 4 times as much work
Step-by-step explanation:
The kinetic energy for a given mass and velocity is ...
KE = (1/2)mv^2 . . . . . m is mass
At its initial speed, the kinetic energy of the car is ...
KEi = (1/2)(810 kg)(23.6 m/s)^2 ≈ 2.256×10^5 J . . . . . m is meters
At its final speed, the kinetic energy of the car is ...
KEf = (1/2)(810 kg)(47.2 m/s)^2 ≈ 9.023×10^5 J
The ratio of final to initial kinetic energy is ...
(9.023×10^5)/(2.256×10^5) = 4
4 times as much work must be done to stop the car.
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You know this without computing the kinetic energy. KE is proportional to the square of speed, so when the speed doubles, the KE is multiplied by 2^2 = 4.
Answer:
maybe you should add the question and someone could help you out
Step-by-step explanation:
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Answer:
The largest number is 218.
Step-by-step explanation:
The given numbers are 2,5,8,9,10, given operations are ×,+,+,- and exactly one pair of parentheses.
We need to find the largest number which can be form by using given information.
We know that multiplication of two lager numbers is greater than their addition.
We need to multiply 10 and sum of 9,8,5. To get the largest number we have subtract the smallest number.
So, the largest possible number is defined by the expression
Therefore, the largest number is 218.
