What is kinematics..???

Physics

1 answer:

swat323 years ago

7 0

Answer:

Kinematics is the study of motion, without any reference to the forces that cause the motion. It basically means studying how things are moving, not why they're moving. It includes concepts such as distance or displacement, speed or velocity, and acceleration, and it looks at how those values vary over time.

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an object 50 cm high is placed 1 m in front of a converging lens whose focal length is 1.5 m. determine the image height (in cm)

Juli2301 [7.4K]

Given :

An object 50 cm high is placed 1 m in front of a converging lens whose focal length is 1.5 m.

To Find :

the image height (in cm).

Solution :

By lens formula :

$\dfrac{1}{v} - \dfrac{1}{u} = \dfrac{1}{f}$

Here, u = - 100 cm

f = 150 cm

$\dfrac{1}{v} - \dfrac{1}{-100} = \dfrac{1}{150}\\\\v = - 300 \ cm$

Now, magnification is given by :

$m = \dfrac{v}{u} = \dfrac{h_i}{h_o}\\\\h_i = \dfrac{300}{100}\times 1\\\\h_i = 3 \ m$

Therefore, the image height is 3 m or 300 cm.

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3 years ago

As shown in the video, earth has two tidal bulges at all times. approximately where are these bulges located?

Pepsi [2]

Tidal bulges are always on the opposite side of the Earth.
They are created because of the gravitational influence of the Moon on Earth and inertial's counter balance.

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As the Moon is trying to draw the water towards itself, the inertia tries to keep the water at its place. On the opposite side of the Earth, "behind the Moon", the gravitational force of the Moon is the weakest, so inertia is the strongest. That's why tidal bulges are at the opposite side.

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A railroad car of mass M moving at a speed v1 collides and couples with two coupled railroad cars, each of the same mass M and m

Tatiana [17]

Answer:

Explanation:

Given

mass of each railroad is M

first railroad is moving with velocity $v_1$ and other two's with $v_2$