2 years ago

Which example is a simple machine?

Physics

1 answer:

kirza4 [7]2 years ago

7 0

Answer:

Ramp

Explanation:

All of the other things are fairly complex, bikes have to be made with multiple parts so do cars and steering wheels are another part of a boat, a ramp usually consists of two or fewer parts making it the simplest.

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A ball is dropped from a height of 20 meters. At what height does the ball have a velocity of 10 meters/second?

borishaifa [10]

Answer:B

Explanation:

Initial velocity, u=0m/s

Distance,s=20m

a=+g=9.8m/s*s

Using v*v=u*u+2gs

v*v=0+2*9.8*20

v*v=392

v=19.8

When s=20m, v = 19.8m/s

Therefore when v = 10m/s, s= 10*20/19.8

s =10.1m

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3 years ago

As one moves farther and farther from the Sun, the distance between adjacent planets is _____.

Alenkinab [10]

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3 years ago

Hold a pencil in front of your eye at a position where its blunt end just blocks out the Moon.

Valentin [98]

Answer:

$D = 3.55 \times 10^6 m$

Explanation:

Light rays coming from moon is blocked by the pencil

so as per figure we know that angle subtended by pencil and angle subtended by moon must be same

so we have

$Angle = \frac{Arc}{Radius}$

so we have

$\frac{D}{3.8 \times 10^8 m} = \frac{0.7 cm}{75 cm}$

so we have

$D = 3.55 \times 10^6 m$

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3 years ago

Looters break a statue into pieces. how do you expect the weathering of pieces of rock to change

Naya [18.7K]

This definitely has to do with erosion. We can expect that the statue will weather faster because of more surface area.I hope this is what you were looking for

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