3 years ago

A person walks one mile home and 1/2 mile back towards school. What is the distance traveled? What is the displacement?

Physics

1 answer:

matrenka [14]3 years ago

5 0

The distance is 1 1/2 miles. I do not know what the displacement is.

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A ball is ejected to the right with an unknown horizontal velocity from the top of a pillar that is 50 meters in height. At the

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15.67 m/s

Explanation:

The ball has a projectile motion, with a horizontal uniform motion with constant speed and a vertical accelerated motion with constant acceleration g=9.8 m/s^2 downward.

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$S=\frac{1}{2}gt^2$

where t is the time of the fall. Substituting S=50 m and re-arranging the equation, we can find t:

$t=\sqrt{\frac{2S}{g}}=\sqrt{\frac{2(50 m)}{9.8 m/s^2}}=3.19 s$

Now we now that the ball must cover a distance of 50 meters horizontally during this time, in order to fall inside the carriage; therefore, the velocity of the carriage should be:

$v=\frac{d}{t}=\frac{50 m}{3.19 s}=15.67 m/s$