Question

The driver of a car slams on the brakes when he sees a tree blocking the...

The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration of -5.10 m/s² for 4.25s, making skid marks 62.8 m long. With what speed does the car then strike the tree? The answer to this was 3.94 m/.

From here, If the car has the same initial velocity, and if the driver slams on the brakes at the same distance from the tree, then what would the acceleration need to be (m/s²) so that the car narrowly avoids a collision?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Required acceleration :

a = - 5.2 m/s2

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A car is traveling at 60 mph on a 4% downgrade. Then, the driver sees a...
A car is traveling at 60 mph on a 4% downgrade. Then, the driver sees a fallen tree 250 ft ahead. The driver applies the brakes but still crashes into the tree. The skid marks were found to be 100 ft long, and the coefficient of braking was found to equal 0.50. Neglect aerodynamic resistance and compute the following: a) The driver’s perception reaction time. b) The crashing speed of the vehicle.
A car traveling 57.8 km/h is 21.7 m from a barrier when the driver slams on...
A car traveling 57.8 km/h is 21.7 m from a barrier when the driver slams on the brakes. The car hits the barrier 2.22 s later. (a) What is the car's constant deceleration magnitude before impact? (b) How fast is the car traveling at impact?
A car traveling 54.8 km/h is 23.3 m from a barrier when the driver slams on...
A car traveling 54.8 km/h is 23.3 m from a barrier when the driver slams on the brakes. The car hits the barrier 1.84 s later. (a) What is the car's constant deceleration magnitude before impact? (b) How fast is the car traveling at impact?
A car of mass 772 kg is traveling 26.4 m/s when the driver applies the brakes,...
A car of mass 772 kg is traveling 26.4 m/s when the driver applies the brakes, which lock the wheels. The car skids for 4.47 s in the positive x-direction before coming to rest. HINT (a) What is the car's acceleration (in m/s2)? (Indicate the direction with the sign of your answer.) m/s2 (b) What magnitude force (in N) acted on the car during this time? N (c) How far (in m) did the car travel? m
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT