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Ivahew [28]
4 years ago
5

Mike walks 200 km in 6 hours.he then walks another 100km in 4 hours .what is his average speed?

Physics
1 answer:
kolbaska11 [484]4 years ago
8 0

Average speed is defined as the ratio of total distance covered in total given time

speed = \frac{distance}{time}

here we know that total distance that man moved is

d_1 = 200 km

d_2 = 100 km

so total distance is

d = d_1 + d_2

d = 200 km + 100 km

d = 300 km

now here total time of the motion is

t_1 = 6 hours

t_2 = 4 hours

total time will be given as

t = t_1 + t_2

t = 6 + 4 = 10 hours

now by above formula

v_{avg} = \frac{300}{10}

v_{avg} = 30 km/h

so his average speed is 30 km/h

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Suppose a clay model of a koala bear has a mass of 0.200 kg and slides on ice at a speed of 0.750 m/s. It runs into another clay
kaheart [24]

Answer:

0.278 m/s

Explanation:

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So we can write:

mu=(m+M)v

where

m = 0.200 kg is the mass of the koala bear

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3 years ago
The area of the piston to the master cylinder in a hydraulic braking system of a car is 0.6 square inches. If a force of 5.6 lb
balu736 [363]

Answer:

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Force applied on the piston = F_1=5.6 lb

Area of the piston = A_1=0.6 inches^2

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Area of the brakes = A_2=1.8 inches^2

Applying Pascal's law: 'For an incompressible fluid pressure at one surface is equal to the pressure at other surface'.

\frac{F_1}{A_2}=\frac{F_2}{A_2}

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3 years ago
What is the frequency, in units of kiloHertz, of an AC waveform that has a period of 12 microseconds?
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Answer:

83.3 kHz

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f=\frac{1}{T}

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T=12 \mu s=12\cdot 10^{-6} s

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f=\frac{1}{12 \cdot 10^{-6} s}=8.33\cdot 10^4 Hz

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3 years ago
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