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VLD [36.1K]
3 years ago
5

A pool ball is rolling at a velocity of 12 cm/s to the right when it is hit by another ball. It continues moving right at a velo

city of 21 cm/s. If the collision lasts 0.45 seconds, what is the ball's acceleration?
A.+9 cm/s2
B.20 cm/s2 to the right
C.26 cm/s2 to the right
D.+46 cm/s2
Physics
1 answer:
madam [21]3 years ago
6 0

Answer:

B

Explanation:

Acceleration = rate of change in velocity

a = (21-12)/(0.45) = 20cm/s^2

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Ph11_UnitPacket2019
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Let's see

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3 0
2 years ago
Which objects will likely have the smallest gravitational force between them?
DENIUS [597]

Answer:

A. Two tennis balls that are near each other  

Explanation:

The formula for gravitational force (F) between two objects is

F = \dfrac{Gm_{1}m_{2}}{d^{2} }

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Thus, two objects that are far from each other will have a smaller gravitational force. We can eliminate Options C and D.

If the objects are at the same distance, those with the smaller mass will have a smaller force.

The mass of a tennis ball is 57 g.

The mass of a soccer ball is 430 g.

Two tennis balls that are near each other will have a smaller gravitational attraction.

3 0
3 years ago
2. An elephant puts a force of 30,000 N on its four feet, which have a
Alja [10]
Pressure = force ( in newtons ) / area ( in m^2 )

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8 0
3 years ago
If the wavelength of an s-wave is 23,000 m, and its speed 4500 m/s, what is its frequency?
wolverine [178]

Answer:

5 metre.

Explanation:

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= 23,000/ 4,500

= 5 metre.

3 0
2 years ago
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