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3 years ago

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show that the value of g is independent to the mass of the free falling body. The weigh of the person on the earth is 72 kg wt,

at what height it weight becomes 32kg wt?

1 answer:

alexdok [17]3 years ago

3 0

Answer:

I will show u

Explanation:

F=mg

F=GMm÷r(square)

Therefore mg=GMm÷r(square)

S all m on both sides will be cut.

Therefore mass of a free falling body is useless.

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AHH please help-

umka2103 [35]

Answer:

Radiation

Explanation:

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3 years ago

7. A car moving at 10m/s (about 22.4 mph) crashes into a barrier and stops in 0.25 m.

Galina-37 [17]

Answer:

a) 0.05s

b) 4000N

Explanation:

a)When car is stopped its final velocity become zero

U- 10 m/s

V- 0 m/s

S - 0.25 m

t -?

S = (v+u)*t/2

0.25 =(10+0)*t/2

t = 0.05s

b) If we happened to calculate the avarage force we have to consider about acceleration

V= 0

U = 10

t = 0.05 s

a =?

V = U + at

0 = 10 -a * 0.05

a = 200 m/s2

F = m *a

= 20 * 200

= 4000N

6 0

3 years ago

Select the correct answer.

anyanavicka [17]

<h2>MULTIPLE CHOICES</h2>

$\large\mathcal{QUESTION:}$

What is the basic unit of all matter?

$\large\mathcal{CHOICES:}$

OA neutron
OB. atom
OC. electron
OD. proton
OE. nucleus

$\large\mathcal{ANSWER:}$

B. Atom

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<u>Atom</u> is the smallest, <u>indivisible unit of a chemical</u> <u>element and the fundamental unit of matter</u>. It consists of a nucleus (neutrons + protons) surrounded by an electron cloud. The <u>atom</u> is the smallest unit of matter that cannot be divided chemically and is a building block with its own set of properties.

<h3>#ProvideUniqueAnswers</h3>

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2 years ago

5. Which of the following is velocity? *

ivann1987 [24]

A. 20m/s because the unit for velocity is m/s

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3 years ago

The piece of wood shown above has a mass of 20 grams. Calculate its volume and density. Then

kozerog [31]

We have that The Density and Volume is given as

$\rho=0.67\\\\\V=30cm^3$

The factors that affect Density are Mass and Volume

From the question we are told that

The piece of wood shown above has a mass of 20 grams.

Wood parameters

2cm

5cm

3cm

Generally the equation for the Volume is mathematically given as

$V=L*B*H\\\\\V=2*5*3\\\\V=30cm^3$

Generally the equation for the Density is mathematically given as

$\rho=\frac{m}{v}\\\\\\rho=\frac{20}{30}\\\\\rho=0.67$

Therefore the factors that affect Density are Mass and Volume

For more information on this visit

brainly.com/question/19694949?referrer=searchResults

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3 years ago