Homework Help: physics

Posted by apol on Thursday, December 9, 2010 at 12:17am.

The driver of the car traveling at a constant 25m/s sees a child suddenly run into the road. It takes the driver 0.45s to hit the brakes. As it slows, the car has a steady acceleration of 8.5m/s₂. What the total distance the car move before it stops.

physics - drwls, Thursday, December 9, 2010 at 1:49am
Before hitting the brakes, the car travels 0.45 s * 25 m/s = 11.25 m

While decelerating, it travels for
t = 25/8.5 = 2.94 seconds. During that time it travels 12.5 m/s*2.94s = 36.8 m

Add the two distances

Answer this Question

Related Questions

physics - The speed limit in a school zone is 40.0 km/hr. A driver traveling at ...
Physics - The speed limit in a school zone is 40 km/h. A driver traveling at ...
physics - The speed limit in a school zone is 38 km/h. A driver traveling at ...
physics - A car is traveling 26 m/s when the driver sees a child standing in the...
physics - A car is traveling 15 m/s when the driver sees a child standing on the...
Physics - A car is traveling 17 m/s when the driver sees a child standing on the...
Physics - A car is traveling 28 m/s when the driver sees a child standing on the...
physics - A car is traveling 20 m/s when the driver sees a child standing on the...
physics - A car is traveling 20 m/s when the driver sees a child standing on the...
Physics - A car is traveling 15 m/s when the driver sees a child standing on the...

For Further Reading

First Name:
School Subject:
Answer: