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Physics 77 Online
LonePieceOfToast:

A ball starts from rest. It rolls down a ramp and reaches the ground after 4 seconds. Its final velocity when it reaches the ground is 7.0 meters/second. The initial velocity of the ball is 0 / 1.75 / 7 meters/second, and its acceleration is -7 / 0 / 1.75 / 7 meters/second2

lowkey:

What is it asking?

LonePieceOfToast:

1 attachment
LonePieceOfToast:

1 attachment
lowkey:

Oh okay. If a ball starts from rest, the initial velocity is zero. Knowing this, what is your answer for number one?

LonePieceOfToast:

7?

lowkey:

Um, no, zero. Says the ball starts from rest, which means the initial velocity is zero, which means the first one is zero

LonePieceOfToast:

oh I thought you meant the second one

lowkey:

Lol the second one So to find out acceleration, you use the formula v=at 7=a(4)

lowkey:

a=1.75

LonePieceOfToast:

oh ok I promise I'm not that dumb lol

lowkey:

?

LonePieceOfToast:

ok never mind lol have a good evening

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