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sveticcg [70]
2 years ago
6

Ian walks 2km to his best friends house, the. Walks .5km to the library. Then makes a 2.5 km walk home. The entire walk took 3 h

ours. What is his average speed in km/h?
Physics
2 answers:
max2010maxim [7]2 years ago
8 0
1.66 km/h or 1 2/3 km/h
Lisa [10]2 years ago
6 0

Average speed = (total distance traveled) / (total time to travel the distance)

Ian's total distance = (2km + 0.5km + 2.5km) = 5 km

Time for the entire walk) = 3 hrs

Average speed = (5km) / (3hrs) = <em>1.67 km/hr</em>

Average speed = (1 and 2/3) km/hr

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Alex Ar [27]

Answer:

 avriage force F = 2722.5 N

Explanation:

For this problem we can use Newton's second law, to calculate the average force and acceleration we can find it by kinematics.

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The final carriage speed is zero (vf = 0)

      0 = v₀² - 2ax

      a = v₀² / 2x

      a = 1.1²/(2 0.200)

      a = 3.025 m / s²

      a = 3.0 m/s²

We calculate the average force

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3 0
2 years ago
6.6 kg block initially at rest is pulled to theright along a horizontal, frictionless surfaceby a constant, horizontal force of
neonofarm [45]

Answer:

v = 3.04 m/s

Explanation:

given,

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initial speed  = 0 m/s

speed of the block,v = ?

we now

Work done is equal to change in Kinetic energy.

Work done = Force x displacement

W = Δ K E

Δ K E = Force x displacement

\dfrac{1}{2}mv^2 - \dfrac{1}{2}mu^2= F .s

\dfrac{1}{2}\times 6.6 \times v^2 - 0= 12.2\times 2.5

 3.3 v² = 30.5

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4 0
2 years ago
While John is traveling along an interstate highway, he notices a 150 mi marker as he passes through town. Later John passes a 1
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Answer:

Part a)

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Part b)

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Part a)

Since the distance marker is showing the distance between the town and the position of john at all time

so here we have

d = 112 miles

Part b)

Current position of John is given as

r = 112 miles

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7 0
3 years ago
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Shkiper50 [21]

Answer:

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2 years ago
1*2+2+1+5 by how much?
kozerog [31]

Answer:

10

Explanation:

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