Physics
13.08.2021 03:49
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3. you shoot an arrow straight up into the air with a velocity of 25 m/s. a. what
3. you shoot an arrow straight up into the air with a velocity of 25 m/s.
a. what is the velocity of the arrow at its peak?
b. how high did the arrow go?
c. how long is the arrow in the air?
Show Answers
a. what is the velocity of the arrow at its peak?
b. how high did the arrow go?
c. how long is the arrow in the air?
zaniathomasel
4,5(56 marks)
Known :
m1 = 80 kg
v1 = 6 m/s
m2 = 40 kg
Solution :
p1 + p2 = p3
m1 • v1 + m2 • v2 = (m1 + m2) • v
Since body 2 is stationery before collision, then v2 = 0
m1 • v1 = (m1 + m2) • v
(80 kg)(6 m/s) = (80 kg + 40 kg) • v
v = 4 m/s
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