# physics

There is a car turning on an unbanked road. The mass of the car is 2000kg moving at constant speed 36mph. The radius of the unbanked curve is 100m. the driver sees an obstacle at 20m ahead along the curve. he presses the brakes and expects to have a constant deceleration along the curve to stop just before he hits the obstacle.

what is the deceleration that the car would have if it didn't start to slide?
what is the tangential component of the acceleration
what is the normal component of accleraton
what is the magnitude of the static friction force

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1. a, deacceleration:
vf^2=vi^2 + 2ad solve for a

b. same as a.

c. Normal=v^2/r changes in time as slowing.

d. same as c, and changes with velocity

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