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2 years ago

6

A roller coaster rider traveling in a straight line changes from a speed of 4 m/s to 16 m/s in 3 seconds. What is the accelerati

on of the rider?
A. 1.33 m/s2
B. 3 m/s2
C. 5.33 m/s2
D. 4 m/s2

1 answer:

frez [133]2 years ago

3 0

Answer:27

Explanation:

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Answer:

$Fr=12544N$

Explanation:

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The maximal friction force is given by the equation $Fr=usmg$ , where μs is the static friction coefficient, m is the car´s mass and g is the gravitational force.

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3 years ago

A circular radar antenna on a Coast Guard ship has a diameter of 2.10 m and radiates at a frequency of 16.0 GHz. Two small boats

Anna35 [415]

Answer:

d = 76.5 m

Explanation:

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<u>Where:</u>

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L: is the distance of the two boats from the ship = 7.00 km = 7000 m

To find λ we can use the following equation:

$\lambda = \frac{c}{f}$

<u>Where:</u>

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Hence, the distance is:

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Therefore, the boats could be at 76.5 m close together to be detected as two objects.

I hope it helps you!

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