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Law Incorporation [45]

4 years ago

8

If a stone with an original velocity was of 0 Is falling from a ledge and takes 8 seconds to hit the ground what is the final ve

locity of the stone

1 answer:

Llana [10]4 years ago

3 0

A=(v-u)/t
10=v/8
v=80(unit)

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What does it mean by "the mass of an object is 5 kg"

sergiy2304 [10]

Answer:

It has a mass of 5 kilograms

Explanation:

Kg is the unit of mass. So a 5kg object has a mass of 5kg. The weight you associate with it is only relevant on Earth (under its specific gravity)

credits: EliteDaMyth

4 0

3 years ago

A block with a mass of 6.0 kg is

Umnica [9.8K]

(a) The normal force on the block is 50.92 N.

(b) The horizontal force on block keeping it in equilibrium is 29.4 N.

The given parameters;

<em>mass of the block, m = 6 kg</em>
<em>angle of inclination, θ = 30.0°</em>

The normal force on the block is calculated as follows;

$F_n = W \times cos(\theta)$

where;

<em>W is the weight of the block</em>

$F_n = mg \times cos(\theta)\\\\F_n = 6 \times 9.8 \times cos(30)\\\\F_n = 50 .92 \ N$

The horizontal force on block keeping it in equilibrium is calculated as follows;

$F- F_x = 0\\\\F-mgsin\theta= 0\\\\F = mgsin\theta\\\\F = 6 \times 9.8 \times sin(30)\\\\F = 29.4 \ N$

Learn more here:brainly.com/question/24860178

5 0

2 years ago

Seeing how strong our gravitational pull is here on Earth, would it be possible to kill someone if you drop a penny off the Empi

nadezda [96]

That's an urban legend that's been around for a long time.
It was tested on "Mythbusters". The conclusion was that
it would sting pretty good, and maybe raise a lump, but
it would never penetrate the skull, and it couldn't kill.

4 0

3 years ago

A person exerts a 19-N force on a cart attached to a spring and holds the cart steady. The cart is displaced 0.060 m from its eq

Mariana [72]

To solve this problem, apply the concepts related to Hooke's law. From there we will find the spring constant. Subsequently, applying Energy balance, which includes gravitational potential energy, elastic potential energy and kinetic energy, we will bury the system's energy. Finally, using the displacement expression for the simple harmonic movement, we will find the expression that describes the system.

PART A) The expression for the spring force is

$F=kx$

Here,

k = Spring constant

x = Displacement

Rearranging to find the spring constant we have that

$k = \frac{F}{x}$

$k = \frac{19}{0.06}$

$k = 316.66N/m \approx 320N/m$

PART B ) The gravitational potential energy acts on the spring holds the cart is zero. Since cart is placed in the equilibrium position. The kinetic energy of the cart is zero. Therefore the expression for the total energy is,

$E = (PE)_g+(PE)_{spring}+KE$

$E = 0+\frac{1}{2} kx^2+0$

$E = \frac{1}{2} (316.66N/m)(0.06)^2$

$E = 0.569J \approx 0.57J$

PART C) The expression for the angular frequency is

$\omega = 2\pi f$

$\omega = 2\pi (1Hz)$

$\omega = 2\pi rad/s$

The equation for the motion of the cart is

$x(t)= Acos(\omega t)$

Replacing,

$x(t) = 0.06 cos (2\pi t)$

5 0

3 years ago

How does light travel from our light source? What kind of light is it and what is it made of?

suter [353]

Answer:

light is a form of energy produced by a light source. Light is made of photons that travel very fast. Photons of light behave like both waves and particles

Explanation:

4 0

3 years ago

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