3 years ago

The speed of an object in a set direction is called its what?

Physics

2 answers:

Bess [88]3 years ago

6 0

That would be the velocity.

alisha [4.7K]3 years ago

3 0

The speed of an object in a set direction is its velocity.

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An object is moving at a constant velocity of 10 m/s for 5 seconds. What is

german

initial velocity (u)=0m/s

final velocity (v)=10m/s

time( t)=5s

acceleration (a)=v-u÷t

acceleration (a)=10-0÷5

acceleration (a)=10÷5

acceleration (a)=2

therefore acceleration (a)=2m/s

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3 years ago

When a ball rolls down a hill, what energy conversion occurs?

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Answer:

Explanation:

When a ball rolls down a hill, Potential Energy Conversion takes place to Kinetic Energy.

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The magnetosphere protects Earth from _____. a.solar radiation b. the solar wind c. the cold of space d.asteroid hits e.gamma ra

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3 years ago

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You take the same 3 kg metal block and slide it along the floor, where the coefficient of friction is only 0.4. You release the

spin [16.1K]

Answer:

1.52905 seconds

4.58715 m

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

$\mu$ = Coefficient of friction = 0.4

g = Acceleration due to gravity = 9.81 m/s²

a = Acceleration = $\mu g$

Equation of motion

$v=u+at\\\Rightarrow t=\frac{v-u}{\mu g}\\\Rightarrow t=\frac{0-6}{-0.4\times 9.81}\\\Rightarrow t=1.52905\ s$

It will take 1.52905 seconds for the block to slow down

$v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2\mu g}\\\Rightarrow s=\frac{0^2-6^2}{2\times 0.4\times -9.81}\\\Rightarrow s=4.58715\ m$

The block will travel 4.58715 m before it stops

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3 years ago

What does the law of conservation of energy say

HACTEHA [7]

Answer: states that energy can neither be created nor destroyed - only converted from one form of energy to another.

Explanation:

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