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3 years ago

_________ acceleration occurs when an object speeds up.

Physics

2 answers:

Angelina_Jolie [31]3 years ago

7 0

Positive acceleration occurs when an object speeds up.

Explanation:

Acceleration is the rate of change in velocity per unit time:

$a=\frac{\Delta v}{\Delta t}$

where $\Delta v$ is the change in velocity while $\Delta t$ is the time interval. From the formula, we can understand that when $\Delta v$ is positive, so when the object is speeding up, the acceleration is positive; on the contrary, when $\Delta v$ is negative (so, when the object is slowing down), the acceleration is negative.

fiasKO [112]3 years ago

7 0

The Positive acceleration of a body is the acceleration that speeds up the object under acceleration.

Explanation:

The acceleration of a body is a vector quantity that requires the direction along with the magnitude for its representation. The acceleration of a body is defined as the change in velocity per unit time of the body under the motion.

The direction of acceleration helps in determining whether the body will speed up or its speed will decrease during the motion under the acceleration.

If the direction of acceleration of the body is in the direction opposite to the motion of the body, then this acceleration of body will reduced the velocity of the object.

On the other hand, if the direction of acceleration of the body is same as the direction in which the body is moving, then it will speed up the object during the motion.

The acceleration of the body acting in the direction opposite to the motion of the body is called as the negative acceleration whereas the acceleration of the body along the direction of motion of the body is termed as the positive acceleration.

Thus, The Positive acceleration of a body is the acceleration that speeds up the object under acceleration.

Learn More:

1. Minimum coefficient of the static friction between feet and floor brainly.com/question/1621778

2. To calculate broadcast wavelength of radio station: brainly.com/question/9527365

3. Stress in the bungee cord: brainly.com/question/12985068

Answer Details:

Grade: High School

Subject: Physics

Chapter: Acceleration

Keywords:

acceleration, speed, velocity, positive, speeds up, direction, opposite, along, motion, reduce, increase.

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3 years ago

The fluid pressure 10 ft underwater is _____ the fluid pressure 5 ft underwater. A.less than or greater than, depending on what

just olya [345]

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3 years ago

The initial height of the water in a sealed container of diameter 100.0 cm is 5.00 m. The air pressure inside the container is 0

katen-ka-za [31]

Answer:

a) F = 2.66 10⁴ N, b) h = 1.55 m

Explanation:

For this fluid exercise we use that the pressure at the tap point is

Exterior

P₂ = P₀ = 1.01 105 Pa

inside

P₁ = P₀ + ρ g h

the liquid is water with a density of ρ=1000 km / m³

P₁ = 0.85 1.01 10⁵ + 1000 9.8 5

P₁ = 85850 + 49000

P₁ = 1.3485 10⁵ Pa

the net force is

ΔP = P₁- P₂

Δp = 1.3485 10⁵ - 1.01 10⁵

ΔP = 3.385 10⁴ Pa

Let's use the definition of pressure

P = Fe / A

F = P A

the area of a circle is

A = pi r² = [i d ^ 2/4

let's reduce the units to the SI system

d = 100 cm (1 m / 100 cm) = 1 m

F = 3.385 104 pi / 4 (1) ²

F = 2.66 10⁴ N

b) the height for which the pressures are in equilibrium is

P₁ = P₂

0.85 P₀ + ρ g h = P₀

h = $\frac{P_o ( 1-0.850)}{\rho \ g}$

h = $\frac{1.01 \ 10^5 ( 1 -0.85)}{1000 \ 9.8}$

h = 1.55 m

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2 years ago

Describe what happens to chemical bonds during a chemical reaction

dimulka [17.4K]

Explanation:

The bonds that keep molecules together break apart and form new bonds during chemical reactions, rearranging atoms into different substances. Each bond takes a distinct amount of energy to either break or form; the reaction does not take place without this energy, and the reactants stay as they were.

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2 years ago

A transformer has 1000 turns in the primary coil and 100 turns in the secondary coil. If the primary coil is connected to a 120

alexdok [17]

Answer:

12 V, 0.5 A

Explanation:

For the Voltage,

Using,

Vs/Vp = Ns/Np.......................... Equation 1

Where Vs = Voltage in the secondary coil, Vp = Voltage in the primary coil, Ns = number of turn in the secondary coil, Np = number of turns in the primary coil.

Make Vs the subject of the equation

Vs = Vp(Ns/Np)........................ Equation 2

Given: Vp = 120 v, Np = 1000 turns, Ns = 100 turns

Substitute into equation 2

Vs = 120(100/1000)

Vs = 120×0.1

Vs = 12 v

For the current,

Using

Ns/Np = Ip/Is....................... Equation 3

Where Ip = current in the primary coil, Is = current in the secondary coil

make Is the subject of the equation

Is = Ip(Np/Ns).................. Equation 4

Given: Np = 1000 turns, Ns = 100 turns, Ip = 0.05 A

Substitute into equation 4

Is = 0.05(1000/100)

Is = 0.05×10

Is = 0.5 A.

Hence the voltage and the current in the secondary coil is 12 V, 0.5 A

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3 years ago

Read 2 more answers