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3 years ago

I need help with 6 and 7

Physics

1 answer:

densk [106]3 years ago

6 0

Explanation:

6. Force = mass × acceleration

F = m Δv / Δt

F = (0.155 kg) (50.0 m/s − (-44.0 m/s)) / (0.00450 s)

F = 3240 N

7. Force = mass × acceleration

F = m Δv / Δt

75 N = (180 kg) (2.0 m/s − 0 m/s) / Δt

Δt = 4.8 s

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A 50gk boy on a rough horizontal ground the coefficeint of static friction is 0.68

Soloha48 [4]

Given that,

Mass of a boy = 50 kg

The coefficient of static friction = 0.68

To find,

Let us assume we need to find the maximum static friction between the boy and the ground.

Solution,

The formula for the maximum static friction between the two objects is given by :

$F=\mu N$

Where

N is normal force

Substitute all the values,

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3 years ago

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kirill [66]

Answer:

Physical and chemical properties

Explanation:

There are different types of properties

<u>Physical properties</u>

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And these are classified as follows.

Properties that do not depend on the amount of substance considered are called intensive properties, such as melting temperature or density. The so-called extensive properties are those that depend on the amount of material substance, such as volume or mass.

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Answer:

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