Rest Covers
Posted August 12, 2010
By admin
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TopCase SOLID BLACK Keyboard Silicone Skin Cover with palm rest area for Macbook Pro 13" A1278 including Free Mouse Pad Sale Price: $2.99  |
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Including a FREE TOP CASE ® Mouse Pad. Exclusively for sale by TOP CASE ONLY. |
an 8kg car accelerates from rest and covers 5 meters in 2.4 seconds?
what is the net force acting on the car
The equations used are:
F = ma (Newton's 2nd Law)
d = (v0)(t) + (1/2)(a)(t^2), where v0 is the initial velocity, a is the acceleration, and t is the time
Plugging in the values:
5m = (0m/s)(2.4s) + (1/2)(a)([2.4s]^2)
5m = (1/2)(5.76s^2)(a)
a = 1.74m/(s^2)
F = (8kg)(1.74m/(s^2))
F = 13.9N or 14N with correct significant figures
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