Physics: Air resistance Question (1 Viewer)

[sdd10]

I'm stuck with this air resistance question for physics (moving about)

A car travels along a staright road with a constant speed of 60 km/h. If the driving force is a constant 1800 N and the road friction is 300 N, what is the force of the air resistance?

How would you work out air resistance? Would it be 1500 N because the car isn't accelearting - so net force is equal to 0?

 

[khorne]

Imo, yes I think that would be correct, as F= m * a, and a = 0 therefore f = m* 0 = 0

Therefore sum of all forces = 0

 

[iSplicer]

I'm stuck with this air resistance question for physics (moving about)

A car travels along a staright road with a constant speed of 60 km/h. If the driving force is a constant 1800 N and the road friction is 300 N, what is the force of the air resistance?

How would you work out air resistance? Would it be 1500 N because the car isn't accelearting - so net force is equal to 0?

Yep, thats right. Constant velocity means net force = zero, in which case you would need 1500N of air res.