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sergij07 [2.7K]
3 years ago
8

Objects A and B each have a mass of 25 kilograms. Object A has a velocity of 5.98 meters/second. Object B is stationary. They un

dergo a perfectly elastic collision in one dimension. What is the total kinetic energy of the system after the collision?
A.)1.2 x 10^2 J
B.)4.5 × 10^2 joules
C. 5.0 × 10^2 joules
D. 9.5 × 10^2 joules
E. 1.1 × 10^3 joules
Physics
2 answers:
Vinil7 [7]3 years ago
6 0
There are numerous information's already given in the question. Based on those information's, the answer can be easily deduced.

Mass of the objects = 25 kg
Velocity of object A = 5.98 m/s
Velocity of object B = 0 m/s
Total kinetic energy = (1/2) * mass * (velocity)^2
                                = 0.5 * 25 * (5.98)^2
                                = 4.5 * 10^2 joules.
From the above deduction, we can conclude that the correct option among all the options that are given is option "B".
Genrish500 [490]3 years ago
4 0
<h3><u>Answer;</u></h3>

  = 4.5 * 10^2 joules.

<h3><u>Explanation;</u></h3>
  • A perfectly elastic collision is a type of collision in which kinetic energy is conserved.
  • Therefore, to calculate the kinetic energy of the system after the collision we use the formula 1/2 mv²

Mass = 25 kg

Velocity = 5.98 m/s

KE = 1/2 × 25 × 5.98 ²

     = 447 Joules

This translates to about <em><u>4.5 ×10^2 Joules</u></em>

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Answer:

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Explanation:

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Now, we have to calculate the distance traveled for the driver in this 0.5 seconds before he start to accelerate. Again, is an uniform linear motion:

d=vt\\d=20\frac{m}{s}(0.5s)=10m

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d=v_0t+\frac{1}{2}at^2\\a=\frac{2(d-v_0t)}{t^2}\\a=\frac{2(35m-20\frac{m}{s}*1.5s}{(1.5s)^2}\\a=4.44\frac{m}{s^2}

7 0
3 years ago
Which statement is true?
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Salsk061 [2.6K]

Answer:

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Explanation:

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velocity =  15.33 m/s when the car reaches the bottom of the hill.

where, m = mass

            g = acceleration due to gravity

            h = height from the bottom of hill.

The potential energy is : m×g×h

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Anettt [7]

Ok but y I thought it was upside down tho...

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