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A 1,000-kilogram car traveling with a velocity of +20. meters per second decelerates uniformly at -5.0 meters per second squared until it comes to rest. What is the total distance the car travels as it decelerates to rest? A) 40.m B)20.m C) 10.m D) 80.m

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Respuesta :

AL2006

Starting at 20m/s and losing 5m/s of speed every second,
it takes (20/5) = 4 seconds to stop.

The car's average speed during that time is (1/2)(20+0) = 10m/s.

At an average speed of 10m/s for 4s, it travels (10 x 4) = 40 meters.

The car's mass doesn't matter.  With the same initial speed and
acceleration, the distance traveled would be the same for a car,
a leaf, or a battleship.

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