# Displacement word problem grade 11

1. Aug 6, 2014

### max1020

1. while driving a lady sees a cat run on the road and it takes her 0.80s to react and put her foot on the brake. her car is travelling 25 m/s. (a)how far will the car travel before she puts her foot on the brake and (b) if when the brake is applied the car decelerates at a uniform rate of 9.3 m/s^2, what is the total displacements in the car?

i tried dividing .80s by 25 m/s for (a) but i don't know if its right. and i have no idea how to do the (b)

2. Aug 6, 2014

### Staff: Mentor

You take one step per second and you walk for 3 seconds how many steps do you take?

The lady is traveling at 25 meters/second and travels for 0.8 of a second before hitting the brake and how many meters does she travel?

for part b, show us what formulas you know that might apply to the problem and think I have time, speed and acceleration and want distance...

Last edited: Aug 6, 2014
3. Aug 6, 2014

### max1020

So I would multiply .80*25 which is 20m

4. Aug 6, 2014

### Staff: Mentor

Yes and you can check via units of measure m/s *s is meters.