ToughSTEM
Sign Up
Log In
ToughSTEM
A question answer community on a mission
to share Solutions for all STEM major Problems.
Cant find a problem on ToughSTEM?
0

Superman is standing 124 m horizontally away from lois lane. A villian drops a rock vertically downward with a speed of 2.26 m/s from 19.3 m directly above Lois.

a) If Superman is to intervene and catch the rock right before it hits Lois, what should be his minimum constant acceleration?

b) How fast will Superman be traveling when he reaches Louis?

Edit
Added Fri, 18 Dec '15
Comment
Add a Comment
Solutions
0

a) time taken by rock :

using d = ut + gt^2 /2

19.3 = 2.26t + 4.9t^2

t = 1.77 sec

superman have to travel 124m in 1.77 sec

so , 124 = 0 + a x 1.77^2 /2

a =79.16 m/s2

2) v = u + at = 79.16 x 1.77 = 140.11 m/s

Edit
Added Fri, 18 Dec '15
Comment
Add a Comment
Add Your Solution!
Close

Click here to
Choose An Image
or
Get image from URL
GO
Close
Back
Add Image
Close
What URL would you like to link?
GO
α
β
γ
δ
ϵ
ε
η
ϑ
λ
μ
π
ρ
σ
τ
φ
ψ
ω
Γ
Δ
Θ
Λ
Π
Σ
Φ
Ω
Copied to Clipboard

Add Your Solution
Sign Up
to interact with the community. (That's part of how we ensure only good content gets on ToughSTEM)
OR
OR
ToughSTEM is completely free, and its staying that way. Students pay way too much already.
Almost done!
Please check your email to finish creating your account!
Welcome to the Club!
Choose a new Display Name
Only letters, numbers, spaces, dashes, and underscores, are allowed. Can not be blank.
Great! You're all set, .
A question answer community on a mission
to share Solutions for all STEM major Problems.
Why
The Purpose
How
The Community
Give Feedback
Tell us suggestions, ideas, and any bugs you find. Help make ToughSTEM even better.