teacher drops a book to wake up his class, and the book hits the ground after 0.5 seconds. How high was the book?

Answer:

50 N UP

Explanation:

[tex]F_{g} = 150[/tex]

to

[tex]F_{n} = 200[/tex]

Is adding 50 which means you are going up.

Hope this helped!

Have a supercalifragilisticexpialidocious day!

Answer:

Hypothesis is simply a theory given on something which may be correct or not.

Answer:

6.07 N

Explanation:

Given that,

Force, F = 35 N

It makes 10 degree angle with the positive x-axis.

We need to find the magnitude of the vertical component of the force. It can be given by :

[tex]F_y=F\sin\theta\\\\=35\times \sin(10)\\\\=6.07\ N[/tex]

So, the magnitude of the vertical component of the force is 6.07 N.

Answer:

Vertical component of force is equal to [tex]6.067[/tex] N

Explanation:

The magnitude of the vertical component on any force when α is the angle between the direction of force and the X -axis is

[tex]F_y = F * Sin\alpha[/tex]

Substituting the given values in above equation, we get -

[tex]F_y = 35 * Sin 10\\F_Y = 35 * 0.1736\\F_Y = 6.067[/tex]

Vertical component of force is equal to [tex]6.067[/tex] N

Answer:

mass goes down volume remains the same

Answer:

1.27seconds

Explanation:

Speed = 324 m/s , Distance = 411.48m

Time = Distance/Speed

Time = 411.48/324 seconds

Time = 1.27seconds ( Ans)

Answer:

True

Explanation:

Because in atom the negative charge become lose or gain.

Answer:

b. Comfortable pair of athletic shoes.

Explanation:

Analyzing the information and the options, the fitness product that would most assist Sergio in reaching his weight loss goals would be the pair of comfortable sports shoes, which he could use to do running exercises.

For beginning practitioners it is ideal to start exercising with short 30-minute walks until the body adapts and you gain physical conditioning and endurance.

Running has the advantage of being an excellent exercise that can be practiced anywhere, and helps in the production of dopamine, which produces a feeling of well-being and also helps in reducing hunger, in addition to working and strengthening various muscle groups in the body, activate blood circulation, decrease anxiety, improve cholesterol levels, control blood pressure, etc.

Answer:

b. Comfortable pair of athletic shoes.

Explanation:

Answer:

20kilograms

Explanation:

GPE = MGH

2000 = M × 10m/s2 × 10

100m= 2000

m = 20kg ( Answer)

We are given:

Radius of Venus=  6 * 10⁶ m

Height above the planet's ground = 9.4 * 10⁶ m

Mass of Venus = 4.867 * 10²⁴ kg

Finding the Gravitational Field:

We first need to calculate the distance between the center of masses

Distance between center of masses:

Since the point is above the surface of Venus, the radius of Venus and the height will add

Distance between the center of masses = 9.4*10⁶ + 6 * 10⁶

Distance (r) = 15.4 * 10⁶ m

Now back to Gravitational field!

We know the formula for Gravitational Field:

g = GM / r² [where g is the gravitational field, M is the mass of the planet, r is the distance between the center of masses and G is the gravitational constant]

plugging the known values in the formula:

g = (6.67 * 10⁻¹¹ * 4.867 * 10²⁴) / (15.4*10⁶)²       [G = 6.67*10⁻¹¹ Nm²/kg²]

g = (32.46 * 10¹³) / (237 * 10¹²)

g = (32.46 * 10¹³) / (23.7 * 10¹³)

g = 32.46/23.7                                                   [the 10¹³ got cancelled out]

g = 1.367 N/kg² (or m/s²)

Answer:

3.3kg

Explanation:

Given parameters:

Spring constant = 400N/m

Extension  = 8cm  = 0.08m

Unknown:

Amount of mass the spring is supporting  = ?

Solution:

To solve this problem:

     F  = kE

F is the force

k is the spring constant

E is the extension

  So;

            F  = 400 x 0.08  = 32N

Mass;

       Force  = mass x acceleration due to gravity

          32  = mass x 9.8

  Mass = 3.3kg

The mass the spring is supporting is 3.27 Kg.

We'll begin by calculating the force acting on the spring.

F = Ke

F = 400 × 0.08

F = 32 N

Finally, we shall determine the mass. This can be obtained as follow:

m = F / g

m = 32 / 9.8

m = 3.27 Kg

Therefore, the mass the spring is supporting is 3.27 Kg

Learn more about spring constant:

https://brainly.com/question/13511965

Try to split the questions for easy access

Answer:

I would say increasing the balls kinetic energy

Explanation:

Because she is moving the ball and increasing kinetic energy

Answer:

44J

Explanation:

Given parameters:

Mass of rock  = 0.22kg

Initial velocity  = 20m/s

Distance moved  = 10m

Unknown:

Initial kinetic energy of the rock  = ?

Solution:

To solve this problem, we need to understand that kinetic energy is the energy due to the motion of a body.

It is mathematically expressed as;

     Kinetic energy  = [tex]\frac{1}{2}[/tex] m v²

m is the mass

v is the velocity

   Kinetic energy  =  [tex]\frac{1}{2}[/tex] x 0.22 x 20²   = 44J

Answer:

All extended structure compounds form cubes. Sodium and chlorine atoms both have cubical shapes. In the extended structure of NaCI, atoms are arranged in a cubical pattern

Answer air circulating in a hot air balloon

Explanation:

Answer:

.

Explanation:

Answer:

do sports eg skipping rope, playing basketball, badminton etc. in other words, activities that involve jumping

Answer:

17.6 m/s²

Explanation:

Given:

[tex]v_{f}[/tex] = 90 m/s (final velocity)

[tex]v_{i}[/tex] = 2 m/s (initial velocity)

Δt = 5s (change in time)

The formula for acceleration is:

[tex]a_{avg}[/tex] = Δv / Δt

We can find Δv by doing

Δv = [tex]v_{f}[/tex] - [tex]v_{i}[/tex]

Replace the values

Δv = 90m/s - 2m/s

Δv= 88m/s

Using the equation from earlier, we can find the acceleration by dividing the average velocity by time.

[tex]a_{avg}[/tex] = Δv / Δt

[tex]a_{avg}[/tex] = [tex]\frac{88m/s}{5/s}[/tex]

acceleration = 17.6 [tex]m/s^{2}[/tex]

Explanation:

Taking into account the Ohm's Law, the current in the circuit is 0.75 amperes.

The basic relationships of the intensity of the current, voltage and resistance are as follows:

These two relationships constitute Ohm's Law. So, Ohm's law is the relationship between electrical conductors and their resistance, which establishes that the current that passes through the conductors is proportional to the voltage applied to them.

Ohm's law expressed mathematically is:

V = R×I

where:

In this case, you know:

Replacing:

1.5 volts= 2 ohms* I

Solving:

I= 1.5 volts ÷2 ohms

I= 0.75 amperes

In summary, the current in the circuit is 0.75 amperes.

Learn more about Ohm's law:

Answer:

You need to add a picture:)

Answer:

The horizontal speed with which the slingshot hits the balloon is approximately 57.358 m/s

Explanation:

The given parameters of the slingshot motion are;

The initial velocity of the slingshot, v = 100 m/s

The angle (to the horizontal) at which the slingshot is fired makes, θ = 55°

The path of the slingshot which hits the stationary balloon at the top of its flight = Parabolic trajectory

The horizontal component of the velocity = vₓ = v·cos(θ) = Constant

vₓ = 100 × cos(55°) ≈ 57.358

The horizontal speed with which the slingshot hits the balloon = vₓ ≈ 57.358 m/s.

Answer:

t = 2.40 s

Explanation:

It just told me

Answer:

Her altitude as she crosses the bar, h₂ is approximately 6.1 m

Explanation:

The given parameters of the motion of the pole vaulter are;

The mass of the pole vaulter, m = 57 kg

The speed with which the pole vaulter is running, u = 11 m/s

The speed of the pole vaulter when she crosses the bar, v = 1.1 m/s

The acceleration due to gravity, g = 9.8 m/s²

From the total mechanical energy, M.E. equation, we have;

M.E. = P.E. + K.E.

Where;

P.E. = The potential energy of the motion = m·g·h

K.E. = The kinetic energy of the motion = 1/2·m·v²

By the principle of conservation of energy, we have;

The change (loss) in kinetic energy, ΔK.E. = The change (gain) in potential energy, ΔP.E.

ΔK.E. = 1/2·m·(v² - u²)

ΔP.E. = m·g·(h₂ - h₁)

Where;

h₁ = The ground level = 0 m

h₂ = The altitude with which she crosses the bar

∴ 1/2·m·(v² - u²) = m·g·(h₂ - h₁)

(h₂ - h₁) = (v² - u²)/(2·g) = (11² - 1.1²)/(2·9.8) = 6.11173469388

h₂ = 6.11173469388 + h₁ = 6.11173469388 + 0 = 6.11173469388

h₂ = 6.11173469388

Her altitude as she crosses over the bar, h₂ ≈ 6.1 m.