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trapecia [35]
3 years ago
13

The race car was was moving for 3.7 hours and during that time moved 500 miles east. What is the speed? What is the velocity?

Physics
1 answer:
vaieri [72.5K]3 years ago
8 0

Speed:

v = \frac{500 \,\,\mbox{miles}}{3.7 \,\,\mbox{h}}\approx 135.14 mph

Velocity:

Velocity os speed with director (an oriented vector):

The velocity is 135.14 mph in the direction east

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Answer: Enceladus

Explanation:

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6) If a mass of an object is decreased to half and acting force is reduced by quarter the acceleration of its motion
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Answer:

Decreases to half.

Explanation:

From the question given above, the following data were obtained:

Initial mass (m₁) = m

Initial force (F₁) = F

Initial acceleration (a₁) =?

Final mass (m₂) = ½m

Final force (F₂) = ¼F

Final acceleration (a₂) =?

Next, we shall determine a₁. This can be obtained as follow:

F₁ = m₁a₁

F = ma₁

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Next, we shall determine a₂.

F₂ = m₂a₂

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2F = 4ma₂

Divide both side by 4m

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a₂ / a₁ = F/2m ÷ F/m

a₂ / a₁ = F/2m × m/F

a₂ / a₁ = ½

Cross multiply

a₂ = ½a₁

From the illustrations made above, the acceleration of the car will decrease to half the original acceleration

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