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3 years ago

a girl of mass 40 kg wearing high heel of radius 3mm. find the pressure exerted by her on the ground. [answer the question fast]

Physics

1 answer:

kakasveta [241]3 years ago

7 0

You should calculate 40 kg and the radius 3mm.

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A spring has a 12 cm length. When a 200-g mass is hung from the spring, it extends to 27 cm. The hanging mass were pulled downwa

BartSMP [9]

Answer:

The equation of the time-dependent function of the position is $x(t)=5\cos(8.08t)$

(b) is correct option.

Explanation:

Given that,

Length = 12 cm

Mass = 200 g

Extend distance = 27 cm

Distance = 5 cm

Phase angle =0°

We need to calculate the spring constant

Using formula of restoring force

$F=kx$

$mg=kx$

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

$k=\dfrac{200\times10^{-3}\times9.8}{(27-12)\times10^{2}}$

$k=13.06\ N/m$

We need to calculate the time period

Using formula of time period

$T=2\pi\sqrt{\dfrac{m}{k}}$

Put the value into the formula

$T=2\pi\sqrt{\dfrac{0.2}{13.6}}$

$T=0.777\ sec$

At t = 0, the maximum displacement was 5 cm

So, The equation of the time-dependent function of the position

$x(t)=A\cos(\omega t)$

Put the value into the formula

$x(t)=5\cos(2\pi\times f\times t)$

$x(t)=5\cos(2\pi\times\dfrac{1}{T}\times t)$

$x(t)=5\cos(2\pi\times\dfrac{1}{0.777}\times t)$

$x(t)=5\cos(8.08t)$

Hence, The equation of the time-dependent function of the position is $x(t)=5\cos(8.08t)$

8 0

3 years ago

What is the pair of vectors if summed , would create of equilibrium (a resultant of 0i + 0j) ?

bogdanovich [222]

ANY pair of vectors can produce that resultant, as long as ...

If one of the vectors is V₁ = A i + B j . . . . . . where 'A' and 'B' are any two numbers,

then the other one is V₂ = -A i - B j

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4 years ago

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A car of mass 800 kg is moving at a uniform velocity of 72 km/hr. Find its

kenny6666 [7]

Answer:

P = 16,000 kgm/s

Explanation:

Given :

Mass = m = 800 kg

Velocity = v = 72 km/hr = 20 m/s

Required :

Momentum = P = ?

Formula:

P = mv

Solution:

P = (800)(20)

P = 16,000 kgm/s

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3 years ago

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What is your weighted grade, if you have a 100% on homework and a 88% on tests. {homework is worth 40% of grade and tests are wo

Sphinxa [80]

You would have a 92.8, or a 93.

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3 years ago

Which two options are forms of potential energy

lutik1710 [3]

Answer:

Energy is the ability to do work or cause change. There are two kinds of energy – kinetic energy when something is moving, and potential energy, which is energy that is stored and ready to be used. All objects have potential energy or stored energy if they are placed in a certain position.

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4 years ago

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