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stepladder [879]
2 years ago
10

-A 180 kg hippo is riding a bicycle at a speed of 6.0

Physics
1 answer:
Vlad1618 [11]2 years ago
8 0

Answer:

0.0675 seconds

Explanation:

From the question,

We apply newton's second law of motion

F = m(v-u)/t.................... Equation 1

Where F = force exert by the brake, v = final speed, u = initial speed m = mass of the bicycle, t = time.

make t the subject of the equation

t = m(v-u)/F................... Equation 2

Given: m = 180 kg, u = 6.0 m/s, v = 0 m/s (comes to stop), F = -1600 N ( agianst the dirction of motion)

Substitute these value into equation 2

t = 180(0-6.0)/-1600

t = -1080/-1600

t = 0.0675 seconds.

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Speed with which initially car is moving is 21 m/s

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v_f^2 - v_i^2 = 2a d

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v_f^2 - v_i^2 = 2 ad

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2 years ago
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NEGATIVELY CHARGED:

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MICROCOULOMB:

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Answer:

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Charge, q_1=-3\ nC

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