bullockarwen
16.12.2020 •
History
What’s the force of a pitching machine on a baseball? Baseballs pitched by a machine have a horizontal velocity of 30 meters/second. The machine accelerates the baseball from 0 meters/second to 30 meters/second in 0.5 seconds. If a baseball has a mass of 0.15 kilograms, the force the machine exerts is blank newtons. Use F = ma, where .
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Ответ:
The Machine exerts a force of 9N.
Explanation:
Inital velocity (u) = 0 m/s
Final velocity (v) = 30 m/s
Time (t) = 0.5 s
Acceleration (a) = (v-u)/t
= (30-0)/0.5 m/s2
= 60 m/s2
Mass = 0.15 kg
Force = Mass*Acceleration
= 0.15*60 N
= 9 N
Ответ:
D
Explanation: