Answer:
is the final velocity of the racket.
Explanation:
Given:
- mass of the racket,
- mass of ball,
- initial speed of racket,
- initial speed of ball,
- final speed of ball,
- time of contact of racket with the ball,
<u>By the law of conservation of momentum:</u>
where: final velocity of the racket
is the final velocity of the racket.
<u>By the Newton's second law of motion:</u>
............................(1)
where:
dp = change in momentum
dt = change in time
Change in momentum of ball:
Now, using eq.(1):
Hydrogen gas is harmless to your feet so since you don’t need protection against it that seems the best answer.
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transparent --> translucent --> opaque
A. Is the correct answer
to plow fields beacuse it's much easier to plow on tractor than on foot