3 years ago

Friction exists only when two objects rub against each other. A.True B.False

Physics

2 answers:

DENIUS [597]3 years ago

5 0

Answer:

false

Explanation:

Rus_ich [418]3 years ago

4 0

A. True friction is two objects touching each other

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Equation of velocity is given as

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Part b)

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for acceleration we know that

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at t = 7.93 s

$a = -0.285\hat i + 0.550\hat j$

magnitude is given as

$a = \sqrt{0.285^2 + 0.550^2}$

$a = 0.62 m/s^2$

Part d)

for the direction of the motion

$\theta = tan^{-1}\frac{0.550}{-0.285}$

$\theta = 117.4 degree$

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Ivanshal [37]

Answer:

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Explanation:

Speed = distance divided time

S = d/t

Suppose a Rollerblade racer finished a 132 meter race in 18 seconds. What is the average speed of the Rollerblade racer?

S = 132 divided 18

Speed = 7.33 rounded

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