If a ball is thrown horizontally with an initial velocity of 30 m/s. hits field 4 seconds later. What is its speed the instant before it hits the field?
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If a ball is thrown horizontally with an initial velocity of 30 m/s. hits field 4 seconds later. What is its speed the instant before it hits the field?
Assuming no friction, horizontal componentwill not change. Vertical component increases as
a free fall, thus, thus after 4 seconds you have
.
The total speed can be obtained from
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