3 years ago

What is meant by the statement "Motion is relativel"?

Physics

1 answer:

aleksklad [387]3 years ago

4 0

Answer:

when an object move from its place is called an mation

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In your own words, explain Newton’s first law of motion.

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Newton's first law of motion states that. an object on the rest or motion is stay the same unless external force applied on it.

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A cat with a mass of 4.50 kilograms sits on a ledge 0.800 meters above the ground. If it jumps to the ground, how much kinetic e

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Answer:

The cat will have <span>36J</span> of kinetic energy.

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3 years ago

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A locomotive has a mass of 200,000kg. It is moving at 4.5m/s. Find its momentum .

anastassius [24]

Momentum (p) = mass × velocity

P= 200,000×4.5

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3 years ago

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The box leaves position x=0 with speed v0. The box is slowed by a constant frictional force until it comes to rest at position x

Diano4ka-milaya [45]

Answer:

$Ff=m\times \dfrac{V_o^2}{2X_1}$

Explanation:

Given that

At X=0 V=Vo

At X=X1 V=0

As we know that friction force is always try to oppose the motion of an object. It means that it provide acceleration in the negative direction.

We know that

$V^2=U^2-2aS$

$0=V_o^2-2a X_1$

$a=\dfrac{V_o^2}{2X_1}$

So the friction force on the box

Ff= m x a

$Ff=m\times \dfrac{V_o^2}{2X_1}$

Where m is the mass of the box.

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3 years ago

The velocity of a body is given by the equation v= a + bx, where 'x' is displacement. The unit of b is .......

valina [46]

Answer:

s^ -1 ( or 1/sec)

Explanation:

Velocity is given in units of displacement / sec

like feet /sec or m/sec

so b would have units of s^-1

(or perhaps a more general term would be time^-1)

8 0

1 year ago