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2 years ago

A fisherman moves from one end of a boat to another

Physics

1 answer:

Naily [24]2 years ago

5 0

Answer:

That isnt a question so no one will know the answer to what you are talking about. I suggest adding a sceenshot or picture of the question.

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Two metal bricks are held off the edge of a balcony from the same height above the ground. The bricks are the same size but one

Dvinal [7]

Answer:

Explanation:

Assuming that the air resistance is neglectable, both bricks are only accelerated by gravity, which produces a constant acceleration on both bricks, which is the same, according Newton's 2nd Law, as we can see below:
$F_{g} = m*g = m*a (1)$
⇒a = g = 9.8m/s² (pointing downward)
Since acceleration is constant, if both fall from the same height, we can apply the following kinematic equation:

$\Delta y = v_{o} * t - \frac{1}{2} *g*t^{2} (2)$

Since both bricks are held off the edge, the initial speed is zero, so (2) reduces to the following equation:

$h =\frac{1}{2} *g*t^{2} (3)$

Since h (the height of the balcony) is the same, we conclude that both bricks hit ground at exactly the same time.
If the air resistance is not negligible, due both bricks have zero initial speed, and have the same shape, they will be affected by the drag force in similar way, so they will reach the ground at approximately the same time.

6 0

3 years ago

I need help with science please!

sergiy2304 [10]

<span>Magma is composed of molten rock and is stored in the Earth's crust. Lava is magma that reaches the surface of our planet through a volcano vent. Lavaflow, Hawai</span>

7 0

3 years ago

What kind of charging occurs when you slide your body across a plastic surface?

Romashka [77]

<span>Charging by friction occurs, Electrons are transferred when one object rubs against another.

Another example of this would be socks on carpet.

Hope this helps!</span>

6 0

3 years ago

The figure (Figure 1) shows the velocity of a solar-powered motorhome (RV) as a function of time. The driver accelerates from a

SpyIntel [72]

Explanation :

It is given that, the driver accelerates from a stop sign, cruises for 20 s at a constant speed of 60 km/h, and then brakes to come to a stop 40 s after leaving the stop sign.

We know that acceleration is defined as the rate of change of velocity.

$a=\dfrac{dv}{dt}$

Where

dv is the change in velocity, dv = 0 - 60 m/s = -60 m/s

dt is the change in time, dt = 40 s - 30 s = 10 s

So, $a=\dfrac{-60\ m/s}{10\ s}$

$a = -6\ m/s^2$

From the graph it is clear that, from 30 s to 40 s the car is decelerating. So, at every second within this time the value of acceleration will be same i.e. $-6\ m/s^2$ .

6 0

3 years ago

Ferromagnetic materials-

QveST [7]

Answer:

materials which exhibit a spontaneous net magnetization at the atomic level, even in the absence of an external magnetic field.

Explanation:

When a material is placed within a magnetic field, the magnetic forces of the material's electrons will be affected. This effect is known as Faraday's Law of Magnetic Induction. However, materials can react quite differently to the presence of an external magnetic field. This reaction is dependent on a number of factors, such as the atomic and molecular structure of the material, and the net magnetic field associated with the atoms. The magnetic moments associated with atoms have three origins. These are the electron motion, the change in motion caused by an external magnetic field, and the spin of the electrons.

5 0

3 years ago