PHYSICS HIGH SCHOOL

A tennis ball with a speed of 15.7 m/s is moving perpendicular to a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 14.444 m/s. If the ball is in contact with the wall for 0.0099 s, what is the average acceleration of the ball while it is in contact with the wall? Take "toward the wall" to be the positive direction. Answer in units of m/s 2 .

Answers

Answer 1
Answer:

Answer:

-3044.848m/s^2

Explanation:

Initial velocity = 15.7 m/s (u)

Final velocity = -14.444 m/s (v) velocity after striking moving opposite direction.

Time = 0.0099 s

Average acceleration :

change in velocity/ total time

= V - U/t

= -14.444 m/s - 15.7 m/s/0.0099 s

= -30.144/0.0099 s

= -3044.848m/s^2

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Answers

Answer:

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Explanation:

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Answers

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Final answer:

The two variables that affect current in a circuit according to Ohm's law are voltage and resistance. If voltage increases, current increases assuming resistance remains constant. Conversely, if resistance increases, current decreases.

Explanation:

According to Ohm's law, the two variables that affect the amount of current in a circuit are voltage and resistance. If the voltage in a circuit is increased, according to Ohm's law, so is the current, providing the resistance doesn't change. On the other hand, if the resistance in a circuit is increased, the current is reduced.

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Learn more about Ohm's Law here:

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A light ray traveling in air enters a secondmedium and its speed slows to 1.71 × 10^8 meters
per second. What is the absolute index of
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Answers

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Your answer is (2) 0.570
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