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3 years ago

Which of the following is correct concerning the centripetal acceleration of an object in uniform circular motion? Select one:

Physics

2 answers:

likoan [24]3 years ago

5 0

Answer:

As the direction of the centripetal acceleration is always towards inward, towards the center of curvature of the circular path. So the option c is correct that the centripetal acceleration is directed radially inward.

Explanation:

AlekseyPX3 years ago

4 0

Answer:

C. The centripetal acceleration is directed radially inward

Explanation:

Centripetal in the real sense of it means towards the centre. Any object undergoing a circular motion which is uniform (uniform circular motion) has a centripetal acceleration and that acceleration is directed radially inwards. The acceleration has a magnitude that is equal to the square of the speed of the object along the curve, divided by the distance from the center of the circle to the object in motion.

Mathematically it can be expressed as;

$a_{c}$ = $\frac{v^{2} }{r}$

Where v is the speed/velocity of the moving object and r is the distance of the object from the centre of the circle.

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What steps are involved in converting potential energy to kinetic energy

melomori [17]

Answer:

Decreasing in altitude and increasing in velocity

Explanation:

The formula for potential energy is:

$E_p = mgh$

where m is mass, g is constant gravitational energy and h is the potential altitude.

The formula for kinetic energy is:

$E_k = mv^2/2$

where v is the velocity

Since m,g are constant, to convert from potential energy to kinetic energy, h must decreases while v increases. For example dropping an object from a height.

8 0

4 years ago

Read 2 more answers

HURRY!!!!

VMariaS [17]

Answer:

Ted is correct

Explanation:

The equation for gravitational potential energy is PE = m·g·h

The equation for gravitational kinetic energy is KE = 1/2·m·v²

Where:

m = Mass of the object (The racing car)

g = Acceleration due to gravity

h = The height to which the object is raised

v = Velocity of motion of the object

From the principle of conservation of energy, energy can neither be created nor destroyed but changes from one form to another, we have;

Potential energy gained from location at height h = Kinetic energy gained as the object moves down the level ground

m·g·h = 1/2·m·v² canceling like terms gives

g·h = 1/2·v²

v = (√2·g·h)

If the speed is doubled, we have

2·v = 2× (√2·g·h) = (√2·g·4·h)

Therefore, if 2·v = v₂ then v₂ = (√2·g·4·h)

Since g, the acceleration due to gravity, is constant, it means that the initial height must be multiplied or increased 4 times to get the new height, that is we have;

v₂ = (√2·g·4·h) = (√2·g·h₂)

Where:

4·h = h₂

Which gives;

v₂² = 2·g·h₂

1/2·v₂² = g·h₂

1/2·m·v₂² = m·g·h₂ Just like in the first relation

Therefore, Ted is correct s they need to go up four times the initial height to double the speed.

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3 years ago

A space probe that weighs 5,630 N on the Earth has a weight of 4,504 N on another planet. What is the gravitational field streng

Arturiano [62]

Answer:

6,000 gravity force is your answer another question

4 0

2 years ago

A stun gun or TASER is designed to put out a few seconds worth of electric pulses that impress a

iren [92.7K]

Answer:

Resistance = 400000 Ohms

Explanation:

Given the following data;

Voltage = 1200 V

Current = 3 mA = 3/1000 = 0.003 A

To find the resistance;

Voltage = current * resistance

Resistance = 1200/0.003

Resistance = 400000 Ohms

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3 years ago

Do you think that NASA invented thunderstorms to cover up the sounds of space battles?

ollegr [7]

Answer:

No, NASA did not invent thunderstorms.

Explanation:

Thunder storms are part of the earths natural environmental occurrence. There are no battles in the space.

6 0

4 years ago

Read 2 more answers