# Even more mechanics struggles...Watch

#1
Anyone fancy tackling this question with me please?

Eddy cycles up a hill. His mass, together with the bike is 92 kg. His driving force is 125N and resistance force is 45 N. Eddy travels 350m along the road which rises through a vertical height of 32 metres. His starting speed is 8.2m/s. Find his final speed.
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1 week ago
#2
Assuming "resistive force" doesn't include gravity, you can consider the "net driving force" as 125N - 45N. Then use work done = force x distance moved to deduce the change in net energy.

Then find the change in GPE; now you can deduce the change in KE, and thus the final speed.
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