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Nady [450]
3 years ago
13

A car is moving at a rate of 72 km/hr .How far does car move when it stop after 4 seconds? ​

Physics
1 answer:
Zanzabum3 years ago
5 0

Answer:

Assuming it starts at 72 kmph and hits a dead stop: Divide 72 by 60 for distance per minute. So, 1.2km per minute. 1.2km is 1200m and 4 seconds is one fifteenth of a minute.

Explanation:

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Soloha48 [4]
I think it is a. all matter

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What happens in the gray zone between solid and liquid?
Reil [10]

Answer:

Hence from liquid to solid or solid to liquid the transition has to cross the grey zone. This grey zone transition is is very crucial which includes the intermolecular forces acting on the molecules and each atoms which makes the change in state from hot to cold and cold to hot.

Explanation:

3 0
3 years ago
A tall, cylindrical chimney falls over when its base is ruptured. Treat the chimney as a thin rod of length 53.2 m. At the insta
rusak2 [61]
From an energy balance, we can use this formula to solve for the angular speed of the chimney

ω^2 = 3g / h sin θ

Substituting the given values:
ω^2 = 3 (9.81) / 53.2 sin 34.1
ω^2 = 0.987 /s

The formula for radial acceleration is:
a = rω^2

So,
a = 53.2 (0.987) = 52.494 /s^2

The linear velocity is:
v^2 = ar
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The tangential acceleration is:
a = r v^2
a = 53.2 (2816.887)
a = 149858.378 m/s^2

If the tangential acceleration is equal to g:
g = r^2 3g / sin θ
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θ = 67° 
7 0
3 years ago
Two blocks of masses 1 = 700 and 2 = 1100 are connected by a cord of negligible mass and hung over a diskshaped pulley, as shown
ivanzaharov [21]

Answer:

b) 16 cm

Magnification, m = v/u

3 = v/u

⇒ v = 3u

Lens formula : 1/v – 1/u = 1/f

1/3u = 1/u = 1/12

-2/3u = 1/12

⇒ u = -8 cm

V = 3 × (-8) = -24

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Explanation:

3 0
3 years ago
What is the gain in speed per second for a freely falling object?.
mel-nik [20]

Objects accelerate at ~9.8 Meters per second per second (9.8 Meters peer sec^2. (or ~32 feet per sec^2 for you non metric guys) As they gain speed they will reach a maximum velocity limited by atmospheric resistance, when the resistance vector equals the gravity vector and all acceleration will cease. In a vacuum the object will continue to accelerate.

4 0
2 years ago
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