3 years ago

Imagine that person B is more massive than person A in the picture above.

Physics

1 answer:

Masja [62]3 years ago

6 0

Hippity hoppity your points are my property

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7) $a=8m/s^2$

8) $a=-5m/s^2$

9) $a=-1.5m/s^2$

10) $v=29.4m/s$

Explanation:

For the problems 7, 8 and 9 we just apply the definition of acceleration, since no more information is given, which is:

$a=\frac{\Delta v}{\Delta t}=\frac{v_f-v_i}{t_f-t_i}$

So for each problem we will have:

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8) $a=\frac{10m/s-25m/s}{3s}=-5m/s^2$

9) $a=\frac{0m/s-15m/s}{10s}=-1.5m/s^2$

For the problem 10, we use the equation of velocity in accelerated motion:

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Since the ball starts from rest and the acceleration is that of gravity (we take the downward direction positive), we have:

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