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Crazy boy [7]
3 years ago
9

Determine the amount of work you would need to do in order to stop a 1100kg car with 1400J of kinetic energy.

Physics
1 answer:
LiRa [457]3 years ago
6 0

Answer:

 W = -1400 J

Explanation:

Let's use the relationship between work and kinetic energy

           W = ΔK

             

kinetic energy is

            K = ½ m v²

therefore in this case

             K₀ = 1400 J

         

Thus

            W = 0 -1400

            W = -1400 J

The negative sign indicates that the work is done against the energy, that is, in the opposite direction to the movement

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Two particles P and Q each moves towards ther along Straight Line (M)(N), 51m long. P starts from M with velocity 5m/s and const
bagirrra123 [75]

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<h3>What is the time required?</h3>

The time required for the particles to be at several distances apart is calculated using the equation of motion given below:

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a) Time required to be 30 m apart:

Assuming the distance covered by P is S1 and distance covered by Q is S2.

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Substituting the values of velocity and acceleration in the equation of motion above:

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b) Time required to meet:

Assuming the distance covered by P is S1 and distance covered by Q is S2.

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Learn more about distance, velocity and acceleration at: brainly.com/question/14344386

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