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Aleks [24]
4 years ago
5

__________ is the most important consideration in stopping a vehicle.

Physics
1 answer:
xxTIMURxx [149]4 years ago
5 0
FRICTION is the most important consideration in stopping a vehicle. Stopping a vehicle involves three elements which are brake, tires and the surface with which the car is in contact. Frictional forces between the car tires and the surface contact when the brake is applied stop the car. 
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If a spring is stretched 4m from its starting length when 20n of force is applied, then how much work (in joules) is done by the
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ANSWER:

250 J

STEP-BY-STEP EXPLANATION:

F = 20N is required to stretch the spring by 4 meters

We know that the force is equal to:

F=k\cdot x

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k=\frac{F}{x}=\frac{20}{4}=5\text{ N/m}

The work done in stretching the spring is given by the following equation (in this case the stretch is 10 meters:

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The work required is 250 joules.

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2 years ago
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