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3 years ago

Help me plz!

Physics

2 answers:

olga nikolaevna [1]3 years ago

5 0

As he lifts the sack to his chest from the floor

Inessa05 [86]3 years ago

4 0

Answer: Option (d) is the correct answer.

Explanation:

Work is defined as the force applied in order to move an object from a certain distance.

Mathematically, W = F × d

where, w = work

F = force

d = distance

Thus, when Lester lifts the sack to his chest from the floor then he is doing work as he is applying force on the sack in order to move it over his chest.

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mamaluj [8]

Answer:

Explanation:

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F = M x 48

Mass M = F / 48

a )

When force = 2F and mass = M

Acceleration = force / mass

= 2F /F/48

= 48 X 2 = 96 cm/s²

b )

When force = F and mass = 2M

Acceleration = force / mass

= F /2F/48

= 24 cm/s²

c )

When force = 2F and mass = 2M

Acceleration = force / mass

= 2F /2F/48

= 48 cm/s

d )

When force = 2F and mass = 4M

Acceleration = force / mass

= 2F /4F/48

= 24 cm/s

When force = 4F and mass = 2M

Acceleration = force / mass

= 4F / 2M

= 4F / 2 F/48

= 48 x 2

Acceleration = 96 cm/s²

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4 years ago

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frutty [35]

top beacause it is the highest point

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4 years ago

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Sholpan [36]

Answer:

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3 years ago

When an earthquake occurs, two types of sound waves are generated and travel through the earth. The primary, or P, wave has a sp

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Answer: $d=7.94\times 10^5\ m$

Explanation:

Given

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Speed of secondary wave $v_2=4.5\ km/s$

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$\frac{d}{4.5}-\frac{d}{8}=77.2$

$d[\frac{1}{4.5}-\frac{1}{8}]=77.2$

$d[0.0972]=77.2$

$d=794.23\ km$

$d=7.94\times 10^5\ m$

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3 years ago

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