Answered

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

m/s. Out of nowhere, a chimpanzee runs out in the

hippo's path and he must slam on his brakes. If the

bicycle's brakes exert a force of 1600 N, how

long will it take to stop the bicycle? _s

Sagot :

asuwafohjames

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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