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3 years ago

Please help!!

Physics

1 answer:

Elina [12.6K]3 years ago

8 0

Answer:

C. 4.0 J

Explanation:

Work is equal to the change in kinetic energy or kinetic energy final - kinetic energy initial. 1/2 mv^2 is the equation for kinetic energy. SInce the mass is the same, you don't have to include it when solving. 1/2 times 1^2 = 1/2. 1/2 times 3^2 = 4.5. 4.5 - 0.5 = 4 J

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This time particle A starts from rest and accelerates to the right at 65.5 cm/s

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Answer:

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Explanation:

As we know that the particle A starts from Rest with constant acceleration

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$d_2 = 44 \times t$

now we know that B is already 349 cm down the track

so if A and B will meet after time "t"

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$d_1 = 349 + d_2$

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