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3 years ago

if the displacement of a body is proportional to the square of time, state the nature of motion of the body

Physics

1 answer:

Liula [17]3 years ago

3 0

Explanation:

If the displacement of an object is proportional to the square of the time taken then the body is moving with uniformly accelerated motion as it will follow Newton's second equation of motion for a particular initial velocity, which can be given by, s=ut+21at2.

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A hiker throws a ball at an angle of 21.0° above the horizontal from a hill 21.0 m high. The hiker’s height is 1.750 m. The magn

nydimaria [60]

Answer:

38.8 m

Explanation:

h = -(21 + 1.75) = - 22.75 m

g = - 9.8 m /s^2

Ux = 14.004 m/s

Uy = + 5.376 m/s

Let the ball hits the ground in time t and at a distance d from the base of hill.

Use second equation of motion

h = Uyt + 0.5 at^2

- 22.75 = 5.376 t - 0.5 x 9.8 t^2

4.9 t^2 - 5.376 t - 22.75 = 0

$t=\frac{5.376\pm \sqrt{5.376^{2}+4\times 4.9\times 22.75}}{9.8}$

By solving

t = 2.77 second

So, horizontal distance

d = Ux t

d = 14.004 x 2.77 = 38.8 m

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3 years ago

Two electric charges, held a distance, d, apart experience an electric force of magnitude, F, between them. If one of the charge

Aneli [31]

Answer:

When one of charge is doubled, the magnitude of the force between them gets doubled.

Explanation:

The electric force between two electric charges is given by :

$F=k\dfrac{q_1q_2}{d^2}$

Here,

k is the electrostatic force

d is the separation between charges

$q_1\ and\ q_2$ are charges

If one of the charges is doubled in magnitude while maintaining the same separation between the charges, $q_1'=2q_1$

New force becomes,

$F'=k\dfrac{q_1'q_2'}{d'^2}$

$F'=k\dfrac{(2q_1)q_2'}{d'^2}$

$F'=2k\dfrac{q_1q_2'}{d'^2}$

When one of charge is doubled, the magnitude of the force between them gets doubled. Hence, this is the required solution.

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4 years ago

Consider two identical microscope slides in air illuminated with monochromatic light. the bottom slide is rotated (counterclockw

vlabodo [156]

Answer:

Explanation:ruhfu

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4 years ago

As we learn more, _________ are often revised. scientific laws scientific theories observation experiments

DiKsa [7]

Here is the answer that would best complete the given statement above. <span>As we learn more, SCIENTIFIC THEORIES are often revised. Scientific theories are considered as the substantial explanation of some aspect of the natural world which are gathered through scientific method. Hope this is the answer that you are looking for.</span>

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3 years ago

Read 2 more answers

Given that the electromagnetic force is far stronger than gravity on a per-particle basis, why doesn't the electromagnetic force

Kaylis [27]

Explanation:

The electro magnetic force is given by

F = $\frac{k.q_{1}.q_{2}}{r^{2}}$

where $q_{1}$ and $q_{2}$ are charged particles

k =Coulombs constant

r = distance between two charges

And gravitational force is given by

F = $\frac{G.m_{1}.m_{2}}{r^{2}}$

where $m_{1}$ and $m_{2}$ are masses

G =Garvitation constant

r = distance between two masses

Now since the planets, stars and galaxies are electrically neutral, therefore they have zero electrical charge and so electro magnetic forces have no affect on these planets, stars and heavenly bodies.

Whereas the masses of the heavenly bodies are very large, so they are largely affected by the gravitational force since Gravitational force is directly proportional to the product of the masses of a body.

Therefore, though the electromagnetic force is stronger than the gravitational force, the electromagnetic force does not dominate the forces in the heavenly bodies as they as not electrically charged.

8 0

4 years ago

if the displacement of a body is proportional to the square of time, state the nature of motion of the body ​

if the displacement of a body is proportional to the square of time, state the nature of motion of the body