ZuoTi.Pro
Question

A car is 137 m from a stop sign and traveling toward the sign at 25...

A car is 137 m from a stop sign and traveling toward the sign at 25 m/s. At this time, the driver suddenly realizes that she must stop the car. If it takes 0.200 s for the driver to apply the brakes, what must be the magnitude of the constant acceleration of the car after the brakes are applied so that the car will come to rest at the stop sign?

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

The distance travelled by the car in retardation motion is given by

s = 137-25*0.2= 137-5 = 132 m

The acceleration can be determined using

v^2-u^2 = -2as \\ a = u^2/2s = 25^2/264 = 2.37m/s^2

0 0
Add a comment
Know the answer?
Add Answer to:
A car is 137 m from a stop sign and traveling toward the sign at 25...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • A car is 162 m from a stop sign and traveling toward the sign at 27...

    A car is 162 m from a stop sign and traveling toward the sign at 27 m/s. At this time, the driver suddenly realizes that she must stop the car. If it takes 0.200 s for the driver to apply the brakes, what must be the magnitude of the constant acceleration of the car after the brakes are applied so that the car will come to rest at the stop sign?

  • A car is 115 m from a stop sign and traveling toward the sign at 25...

    A car is 115 m from a stop sign and traveling toward the sign at 25 m/s when the driver suddenly realizes that she must stop the car and applies the breaks. what must be the constant accelaration of the car after the brakes are applied so that the car will come to rest at the stp sign?

  • A 2500 kg car is traveling 25 m/s and brakes to a stop. This causes the...

    A 2500 kg car is traveling 25 m/s and brakes to a stop. This causes the brakes to heat up as the car’s kinetic energy is converted to thermal energy. If the heat in the brakes could be captured and applied to ice at 0 degrees Celsius, how much could it melt?

  • The driver of a 1.19 103 kg car traveling on the interstate at 35.0 m/s (nearly...

    The driver of a 1.19 103 kg car traveling on the interstate at 35.0 m/s (nearly 80.0 mph) slams on his brakes to avoid hitting a second vehicle in front of him, which had come to rest because of congestion ahead. After the brakes are applied, a constant kinetic friction force of magnitude 7.96 103 N acts on the car. Ignore air resistance. (a) At what minimum distance should the brakes be applied to avoid a collision with the other...

  • A car is traveling with a constant speed when the driver suddenly applies the brakes, giving...

    A car is traveling with a constant speed when the driver suddenly applies the brakes, giving the car a deceleration of 3.50m/s2. The car comes to a stop in a distance of 34.0 m. What was an initial speed of the car? How long (the time) did it take for this car to stop? What was the car's speed when it had traveled 17.0 m from the point where the brakes were applied? How long did it take for this...

  • Part A - A car traveling at 11.4 m/s skids to a stop in 10.7 m...

    Part A - A car traveling at 11.4 m/s skids to a stop in 10.7 m from the point where the brakes were applied. In what distance would the car have stopped had it been going 34.2 m/s, if tires and road condition were unchanged (i.e. if the acceleration were the same)? 32.1 m 96.2 m 53.4 m 72.2 m

  • The driver of a car traveling at 54 ft/sec suddenly applies the brakes. The position of...

    The driver of a car traveling at 54 ft/sec suddenly applies the brakes. The position of the car is s=54t-31, 1 seconds after the driver applies the brakes. How many seconds after the driver applies the brakes does the car come to a stop? O A. 54 sec OB. 9 sec O C. 27 sec OD. 18 sec

  • A car of mass 772 kg is traveling 24.4 m/s when the driver applies the brakes,...

    A car of mass 772 kg is traveling 24.4 m/s when the driver applies the brakes, which lock the wheels. The car skids for 5.27 s in the positive x-direction before coming to rest. a). What is the car's acceleration (in m/s2)? (Indicate the direction with the sign of your answer.) b). What magnitude force (in N) acted on the car during this time? c). How far (in m) did the car travel?

  • 2. (13 points) A drag race car le traveling it 95 m/s when it crosses the...

    2. (13 points) A drag race car le traveling it 95 m/s when it crosses the finish line. The driver applies the brakes, which provide a constant acceleration with magnitude 15 m/s (a) (6 points) How long does it take for the car to come to a stop? 9= 15m/s² v=95m/s 95 mis - 15 /s2 6.3 m/s (b) (7 pointa) How far does the cur travel from the finish line to the point where it stops? 9= 15 mis?...

  • •33 SSM LW A car traveling 56.0 km/h is 24.0 m from a barrier when the...

    •33 SSM LW A car traveling 56.0 km/h is 24.0 m from a barrier when the driver slams on the brakes. The car hits the barrier 2.00 s later. (a) What is the magnitude of the car's constant acceleration before impact? (b) How fast is the car traveling at impact?

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT