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lawyer [7]
2 years ago
13

A 40kg cart gains a KE of 200J. How fast does it go?

Physics
1 answer:
34kurt2 years ago
7 0

Answer:

3.16 m/s

Explanation:

Use the formula

k =  \frac{m {v}^{2} }{2}  \\ v =  \sqrt{ \frac{2k}{m} }  \\ v =  \sqrt{ \frac{2(200)}{40} }  \\ v = 3.16 \frac{m}{s}

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Norma-Jean [14]
Given: distance 1 d₁ = 40 m;  distance 2 d₂ = 3.8 m   g = -9.8 m/s²

 Initial Velocity Vi = 0  Final Velocity of stone 2 is unknown = ?

Total distance dₓ = d₁ - d₂  = 40 m - 3.8 m = 36.2 m

Formula: a = Vf² -  Vi²/2d   derive for Final Velocity Vf
 
acceleration is now due to gravity, therefore a = g

Vf = √2gd   Vf = √2(9.8 m/s²)(36.2 m)

Vf = 26.64 m/s  

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3 0
3 years ago
4. The Voyager 1 and 2 spacecraft are now out beyond the orbit of Pluto. They have run out of fuel long ago but are still moving
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Answer:

C

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7 0
3 years ago
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What unita are used to measure electrical current​
JulijaS [17]

Answer:

It's called an ampere!

Explanation:

The SI unit of electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. The ampere (symbol: A) is an SI base unit Electric current is measured using a device called an ammeter.

Hope this helps :)

4 0
3 years ago
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The graphs show the motion of an object in both the x and y directions. Classify the motion of this object.
Natali5045456 [20]

B It is moving in one dimension

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Electromotive force in a circuit;
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A causes free electrons to flow

Explanation:

The amount of force that causes electrons to flow in a conductor is called electromotive force.

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2 years ago
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