Question

An automobile is traveling on a long, straight highway at a steady 77.0 mi/h when the...

An automobile is traveling on a long, straight highway at a steady 77.0 mi/h when the driver sees a wreck 200 m ahead. At that instant, she applies the brakes (ignore reaction time). Between her and the wreck are two different surfaces. First there is 100 m of ice, where the deceleration is only 1.30 m/s2 . From then on, it is dry concrete, where the deceleration is a more normal 7.60 m/s2

Part A.

What was the car’s speed just after leaving the icy portion of the road?

Part B.

What is the total distance her car travels before it comes to a stop?

Part C.

What is the total time it took the car to stop?

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
You're driving down the highway late one night at 20m/s when a deer steps onto the...
You're driving down the highway late one night at 20m/s when a deer steps onto the road 47 m in front of you. Your reaction time before stepping on the brakes is 0.50s, and the maximum deceleration of your car is 10m/s2. A) Part complete How much distance is between you and the deer when you come to a stop? Express your answer to two significant figures and include the appropriate units. B)What is the maximum speed you could have...
Sally is driving along a straight highway. At t = 0, when she is moving in...
Sally is driving along a straight highway. At t = 0, when she is moving in the +x direction at 10 m/s, she passes a signpost at x = 50 m. Her acceleration as a function of time is ax = 2.0 m/s2 – (0.10 m/s3)t . (a) Find her velocity and position x as a function of time. (b) When is her velocity greatest? (c) What is the maximum velocity? (d) Where is the car when it reaches that...
1.A boy jumps from rest, straight down from the top of a cliff. He falls halfway...
1.A boy jumps from rest, straight down from the top of a cliff. He falls halfway down to the water below in 0.756 s. How much time passes during his entire trip from the top down to the water? Ignore air resistance. t = ? 2.An astronaut on a distant planet wants to determine its acceleration due to gravity. The astronaut throws a rock straight up with a velocity of +15.7 m/s and measures a time of 10.5 s before...
1. Over a time interval of 2.20 years, the velocity of a planet orbiting a distant...
1. Over a time interval of 2.20 years, the velocity of a planet orbiting a distant star reverses direction, changing from +23.7 km/s to -24.2 km/s. Find (a) the total change in the planet's velocity (in m/s) and (b) its average acceleration (in m/s2) during this interval. Include the correct algebraic sign with your answers to convey the directions of the velocity and the acceleration. 2.  A car is traveling at a constant speed of 27.2 m/s on a highway. At...