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Newtons 2nd Law - Acceleration Problem

  • #1
104
0

Homework Statement



Starting from a rest position, how long will it take a 50 kg cyclist riding a 10 kg bike to reach a speed of 4 m/s if the resultant force acting on the bicycle is 48 N?

Homework Equations



F=ma
Vf=Vi + at


The Attempt at a Solution



F=ma
(F-48)=(50+10)(a)

At this point I have to unknowns and one apparent equation.
 

Answers and Replies

  • #2
Doc Al
Mentor
44,882
1,129
F=ma
(F-48)=(50+10)(a)

At this point I have to unknowns and one apparent equation.
You are told that the resultant force is 48 N, so why did you write "F - 48"?
 
  • #3
198
18
What is your reasoning for the left side of the equation?
 
  • #4
adjacent
Gold Member
1,549
63
1.
F=ma
(F-48)=(50+10)(a)


The resultant force means the net force.It's not the opposite force
 

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