Posted by **Maryam** on Sunday, September 29, 2013 at 8:26am.

Problem 4- Speedy car, driving at 30 m/s. The driver suddenly observes a slow-moving van 155 m ahead traveling at 5 m/s in the same direction. The driver of the car immediately applies the brakes causing a constant acceleration of 2 m/s2 in a direction opposite to the cars velocity.

a) After the driver of the car applies the brakes, at what time the car will collide with the van?

b) Take x= 0 at the location of the car when the brakes applied, where does the collide with the van?

- Physics -
**bobpursley**, Sunday, September 29, 2013 at 8:43am
if the collide, they have traveled the same distance in the same time.

distance van=155+5t

distancecar=30t-1/2 *2*t^2

set them equal, solve for time t.

then using t, solve for car distance.

- Physics -
**Anonymous**, Tuesday, September 23, 2014 at 11:15pm
t = 10.5 s

## Answer This Question

## Related Questions

- Physics - A driver of a car going 95.0 km/h suddenly sees the lights of a ...
- Physics - Speedy Sue during is driving at 30.0m/s and enters a 1 lane tunnel. ...
- Physics - A driver of a car going 95.0 km/h suddenly sees the lights of a ...
- math, physics - The driver of a car traveling at 60 ft/sec suddenly applies the ...
- physics - The speed limit in a school zone is 40.0 km/hr. A driver traveling at ...
- physics - Speedy Sue, driving at 30.0 m/s enters a one-lane tunnel. She then ...
- physics - The driver of a car traveling at 60 ft/sec suddenly applies the ...
- physics - A driver of a car travelling along a straight road with a speed of 72k...
- calculus - The driver of a car traveling at 60 ft/sec suddenly applies the ...
- physics - Two cars are traveling along a straight line in the same direction, ...

More Related Questions