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Ymorist [56]
3 years ago
6

When can a car have no acceleration but still be moving

Physics
2 answers:
gregori [183]3 years ago
5 0

Answer:

A. A car can still be moving without acceleration when it has some velocity.

B. A car can come to a stop when moving itself when it has some de acceleration.

C.A ca can start at 0 m/s and speed up to 15 m/s when it has some acceleration.

Explanation:

A. since the car has no acceleration the velocity of the car would help it moving.

B. when the car is moving with some velocity but coming to a stop this is possible of and only if it has some de acceleration

C. since the speed of the car increases from 0 to 15 m/s acceleration is involved. If the speed was constant there would be no acceleration involved.

mylen [45]3 years ago
3 0

Answer:

When the velocity of the car is constant.

Explanation:

A car moving with no acceleration possesses a uniform velocity i.e the car velocity is not changing. This means that the car is covering a distance at a particular time interval "on a straight line". The velocity of the car is constant at that point that it has no acceleration because for a body to accelerates, the velocity of the body must be changing i.e the final velocity and the initial velocity must be different.

If the initial and final velocity of a body is the same, this means that the body is moving with a constant velocity and as such not accelerating.

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Answer:

\frac{dA}{dt} = 188.5 m^2/s

Explanation:

As we know that area of the circle at any instant of time is given as

A = \pi r^2

now in order to find the rate of change in area we will have

\frac{dA}{dt} = 2\pi r\frac{dr}{dt}

here we know that

rate of change of radius is given as

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radius of the circle is given as

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now we have

\frac{dA}{dt} = 2\pi (30)(1)

\frac{dA}{dt} = 60\pi

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4 years ago
The outside air pressure changes from 1.0 atm to 1.1 atm. The mass density of mercury is 13,534 kg/m3.By how much does mercury i
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Answer:

The mercury in the barometer rises by a height of 0.0764 m = 76.4 cm = 764 mm

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ΔP = change in pressure = P₂ - P₁ = 1.1 - 1.0 = 0.1 atm = 0.1 × 101325 Pa = 10132.5 Pa

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g = acceleration due to gravity = 9.8 m/s²

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10132.5 = 13534 × 9.8 × h

h = (10132.5) ÷ (13534 × 9.8)

h = 0.0763948996 = 0.0764 m = 76.4 cm = 764 mm

Hope this Helps!!!

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