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Anton [14]
4 years ago
14

Some help please physics

Physics
2 answers:
salantis [7]4 years ago
3 0
My best guess is A  There is missing a time unit in the question.  I know that 4.4 *5 = 21 so that would be my best guess.
REY [17]4 years ago
3 0
The car's AVERAGE speed is (21/2)=10.5 m/s. (Zero at the beginning, 21 at the end.). In order to cover 50m at an average speed of 10.5 m/s, it takes (50/10.5)=4.76 seconds. It took 4.76 seconds to accelerate to 21 m/s^2, so the average acceleration is (21/4.76)=4.2 seconds. You probably had a formula in class that would take you to 4.4, but this is the way I think it through without a lot of formulas.
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Colt1911 [192]

Newton's 2nd law of motion:

Force = (mass) x (acceleration)

= (0.314 kg) x (164 m/s²)

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Notice that the ball is only accelerating while it's in contact with the racket. The instant the ball loses contact with the racket, it stops accelerating, and sails off in a straight line at whatever speed it had when it left the strings.

~ I hope this helped, and I would appreciate Brainliest. ♡ ~ ( I request this to all the lengthy answers I give ! )

5 0
3 years ago
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nekit [7.7K]
In the blank should go of friction.
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3 years ago
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Sati [7]

Answer:

Which sentence from the passage shows that the function of the river depicted here has carried through to modern times?

Explanation:

Which sentence from the passage shows that the function of the river depicted here has carried through to modern times?

4 0
3 years ago
Read 2 more answers
Dimensionally, which of the following could be a velocity? *
astra-53 [7]

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5 0
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Basile [38]

Answer:

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Explanation:

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7 0
3 years ago
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