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A student tosses a 2 kg ball into the air 4 meters above his hand. Ignoring air friction, what will be the magnitude of the velocity of the ball when it returns to his hand?
A 1 m/s
B 2 m/s
C 8 m/s
D 10 m/s
 one year ago
 one year ago
A student tosses a 2 kg ball into the air 4 meters above his hand. Ignoring air friction, what will be the magnitude of the velocity of the ball when it returns to his hand? A 1 m/s B 2 m/s C 8 m/s D 10 m/s
 one year ago
 one year ago

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VeritasVosLiberabitBest ResponseYou've already chosen the best response.0
\[v _{f}^{2}=v _{i}^{2}+2a \Delta x\]
 one year ago

natasha.ariesBest ResponseYou've already chosen the best response.0
but you dont have any velocity
 one year ago

VeritasVosLiberabitBest ResponseYou've already chosen the best response.0
hmm but actually I'm getting 8.85 as my answer
 one year ago

cesckayBest ResponseYou've already chosen the best response.1
potential energy = kinetic energy
 one year ago

natasha.ariesBest ResponseYou've already chosen the best response.0
hmm ill try both equations!
 one year ago

VeritasVosLiberabitBest ResponseYou've already chosen the best response.0
they give the same answer so I think something is missing.
 one year ago

natasha.ariesBest ResponseYou've already chosen the best response.0
wait so it doesnt matter which equation?
 one year ago

VeritasVosLiberabitBest ResponseYou've already chosen the best response.0
no both give the same result.
 one year ago

VeritasVosLiberabitBest ResponseYou've already chosen the best response.0
but Im not sure if the answer is correct since 9 isn't listed.
 one year ago

natasha.ariesBest ResponseYou've already chosen the best response.0
okay would vf = 0 in @VeritasVosLiberabit
 one year ago

VeritasVosLiberabitBest ResponseYou've already chosen the best response.0
vi = 0 you are trying to find vf
 one year ago

natasha.ariesBest ResponseYou've already chosen the best response.0
the answer is supposed to be 8 so i guess thats close right?
 one year ago

natasha.ariesBest ResponseYou've already chosen the best response.0
oh hah yeah my bad
 one year ago

VeritasVosLiberabitBest ResponseYou've already chosen the best response.0
hmm but you dont round downward
 one year ago

VeritasVosLiberabitBest ResponseYou've already chosen the best response.0
if it asks for 1 sigfig the answer should be 9.
 one year ago

natasha.ariesBest ResponseYou've already chosen the best response.0
yeah im a little iffy about that but i can try asking my teacher that one tomorrow morning!
 one year ago

cesckayBest ResponseYou've already chosen the best response.1
either way the question might be wrong taking g= 9.81... my best answer could be 10 :)
 one year ago

natasha.ariesBest ResponseYou've already chosen the best response.0
thanks you guys! ill ask my teacher to verify it
 one year ago

VeritasVosLiberabitBest ResponseYou've already chosen the best response.0
you're welcome.
 one year ago
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