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zvonat [6]
3 years ago
15

Consult Multiple Concept Example 10 in preparation for this problem. Traveling at a speed of 18.2 m/s, the driver of an automobi

le suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.590. What is the speed of the automobile after 1.43 s have elapsed?
Physics
1 answer:
Anettt [7]3 years ago
7 0

Answer:

The speed of the automobile after 1.43s is 10 \frac{m}{s}

Explanation:

a= \frac{-f}{m}= \frac{-u_{k}*m*g}{m}

a= -u_{k}*g=- 0.590* 9.8 \frac{m}{s^{2} }= -5.782 \frac{m}{s^{2} }

V_{f} = V_{i} + a*t

V_{f} = 18.2 \frac{m}{s} - (5.782 \frac{m}{s^{2} }* 1.43 s)

V_{f} = 9.93174 \frac{m}{s}

V_{f} ≅ 10 \frac{m}{s}

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Calculate the buoyant force of a piece of cork of 8cm3 that floats in water. Density of cork is 207kg/m3. ?

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