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iren2701 [21]
3 years ago
7

What is the direction of friction if a ball is rolling on the ground?

Physics
1 answer:
morpeh [17]3 years ago
3 0
The direction is the same as the direction the ball is moving in. Because of the rolling of the ball, the direction of movement of the surface of the ball is opposite the overall direction of the ball. Since friction will oppose the direction of movement of the surface of the ball, it is in the same direction as the net direction of movement of the ball.
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Answer:

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Explanation:

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For many years Colonel John P. Stapp, USAF, held the world's land speed record. He participated in studying whether a jet pilot
Margarita [4]

Answer:

(a) -202 m/s²

(b) 198 m

Explanation:

Given data

  • Initial speed (v₀): 283 m/s

\frac{632mi}{h} .\frac{1609.34m}{1mi} .\frac{1h}{3600s} =283m/s

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  • Time (t): 1.40 s

(a) The acceleration (a) is the change in the speed over the time elapsed.

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(b) We can find the distance traveled (d) using the following kinematic expression.

y = v₀ × t + 1/2 × a × t²

y = 283 m/s × 1.40 s + 1/2 × (-202 m/s²) × (1.40 s)²

y = 198 m

3 0
2 years ago
What is the IMA of the following pulley system?
Furkat [3]

Answer: IMA= \frac {F_r}{F_e}

Explanation:

IMA stands for Ideal Mechanical advantage.

The IMA of pulley system can be defined as the ratio of output force to input force.

From the given pulley system,

The input force = F_e

The output force = F_r

Hence, IMA of the given pulley system,

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Answer:

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Explanation:

In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes

Hope this help also looking it up helps ;)

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D. Interval training
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