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2 years ago

9

If the speed and mass of an object are doubled, which of the following is true?

1 answer:

Harman [31]2 years ago

7 0

Answer:

A is true

Explanation:

Other all are wrong I guess

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A footballer kicks a ball from rest. The foot is in contact with the ball for 0.30s and the final velocity of the ball is 15ms-1

Ne4ueva [31]

Answer:

<h2>50m/s^2</h2>

Explanation:

Step one:

given data

initial velocity u= 0m/s since the ball is at rest

time of contact t= 0.3s

final velocity v=15m/s

Required

acceleration a

from the first law of motion

v=u+at

substitute our given data

15=0+a*0.3

15=0.3a

divide both sides by 0.3

a=15/0.3

a=50m/s

<u>The average acceleration is 50m/s^2</u>

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2 years ago

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Rasek [7]

A warm copper wire will have more conductivity

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The four wheels of a car are connected to the car's body by spring assemblies that let the wheels move up and down over bumps an

Marrrta [24]

Answer: $k=55.590 KN/m$

Explanation:

Given

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Where k=combined spring constant

mg=kx

$k=\frac{mg}{x}$

$k=\frac{68\times 9.81}{1.2\time 10^{-2}}$

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2 years ago

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Answer:

d

Explanation:

distorts or shears rock as it travels through it

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prohojiy [21]

Answer:D

Explanation:

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