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Monocerotis
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Homework Statement
There are two short questions I'm absolutely stumped by. And I can't even find a way to work backwards from the answer to understand them.
Please help if you can, these two questions are driving me nuts ;__;
Question 1)
by applying a force you accelerate a ball upwards at 16m/s2 for 0.5 seconds. How high does the ball go after you let go (from it's starting position)?
--> Answer: 5.26m
Question 2)
How much applied force is required to accelerate a 2.0kg ball upwards at 3.0 m/s2
--> Answer: 27N [Up]
Homework Equations
Ref. 3.
The Attempt at a Solution
Question 1 Attempt
V2= V1(Δt)+ 1/2 Aav(Δt)2
V2= 0(0.5)+ 16m/s2(1/4)
V2 = 4m/s
Δd = V2(Δt) - 1/2 Aav(Δt)2
Δd = 4m/s(0.5s) - 1/2 16m/s(0.5s)2
Δd = 2 - 2
Δd = 0 ?
Question 2 Attempt
Fnet1=(m)(a)
Fnet1 = 2.0kg(3.0m/s2)
Fnet1 = 6N
Fnet2 = (m)(a = g)
Fnet2 = (2.0kg)(9.8m/s2)
Fnet2 = 19.6N
Fnet total = 19.6 + 6
Fnet total = 25.6N
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