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VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Physics => Topic started by: kenhung123 on May 30, 2010, 09:24:34 pm

Title: Deceleration implication
Post by: kenhung123 on May 30, 2010, 09:24:34 pm

When a vehicle or someone riding a bike decelerate, does it imply that the force of engine =0 So Fnet=Friction?

Title: Re: Deceleration implication
Post by: m@tty on May 30, 2010, 09:30:30 pm

No. All that it implies is that the net force has a component opposite to the motion.

You could be providing 800N driving force, but if there is more than that opposing the motion (ie. on a slope component of weight, and friction) then there would be deceleration. Confusing example, but the principle still applies.

Title: Re: Deceleration implication
Post by: Blakhitman on May 30, 2010, 09:31:51 pm

Friction force > Driving force.

so the Net force is towards the opposite direction of the motion.