HomeworkLib
Question

a car is at rest. the driver applies the gas petal to speed it up with...

a car is at rest. the driver applies the gas petal to speed it up with a rate of 3.0m/s^2. How long does it take to travel a distance of 30m? The professor has the answer at (4.5s)

But i think its 10 s with Vf-Vi/a =T can you clarify?

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

Homework Answers

Answer #1

by kinematics we have

d = v_i t + 0.5 at^2

30 = 0* t + 0.5 *3*t^2

t = 4.47 s

0 0
Add a comment
Know the answer?
Add Answer to:
a car is at rest. the driver applies the gas petal to speed it up with...
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 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...

  • A car is traveling at a speed of 20 m/s when the driver applies the brakes....

    A car is traveling at a speed of 20 m/s when the driver applies the brakes. The car stops in 5 seconds. How far (in meters) does the car travel in that time? Assume the car’s deceleration is constant.

  • Problem 3. A car is traveling at a speed of 20 m/s when the driver applies...

    Problem 3. A car is traveling at a speed of 20 m/s when the driver applies the brakes. The car stops in 5 seconds. How far (in meters) does the car travel in that time? Assume the car's deceleration is constant.

  • 74/75 (25 Pts) 1. A car traveling at an initial speed vrounds a bend in the...

    74/75 (25 Pts) 1. A car traveling at an initial speed vrounds a bend in the road and sees that a dog is standing at rest in the middle of the road at a distance D in front of the car. After a short reaction time At, the driver slams on the brakes (at x = 0,t=0), and the car decelerates at a constant rate ac. (8) a. Find the speed of the car v(t) First seas dog and the...

  • A car is moving at a speed of 60 m/s, when the driver applies the brakes,...

    A car is moving at a speed of 60 m/s, when the driver applies the brakes, which causes a deceleration of 2 m/s2. How many seconds will it take for the car to stop and how far will it travel till it stops? 30 sec, 450 meters 25 sec, 800 meters 30 sec, 1800 meters 20 sec, 900 meters 30 sec, 900 meters

  • A driver in a moving car applies the brakes. The car slows to a final speed...

    A driver in a moving car applies the brakes. The car slows to a final speed of 1.30 m/s over a distance of 40.0 m and a time interval of 8.20 s. The acceleration while braking is approximately constant. (a) What is the car's original speed before braking? What is its acceleration during this time? (The car's initial velocity is in the positive direction. Indicate the direction with the sign of your answer.)

  • The driver of a 1550 kg car, initially traveling at 12.1 m/s, applies the brakes, bringing...

    The driver of a 1550 kg car, initially traveling at 12.1 m/s, applies the brakes, bringing the car to rest in a distance of 18.5 m. (a) Find the net work done on the car. (b) Find the magnitude and direction of the force that does this work. (Assume this force is constant.)

  • The driver of a 1550 kg car, initially traveling at 11.6 m/s, applies the brakes, bringing...

    The driver of a 1550 kg car, initially traveling at 11.6 m/s, applies the brakes, bringing the car to rest in a distance of 19.5 m. (a) Find the net work done on the car. (b) Find the magnitude and direction of the force that does this work. (Assume this force is constant.) magnitude

  • A driver of a car on the highway applies the breaks to slow the automobile from...

    A driver of a car on the highway applies the breaks to slow the automobile from 20 m/s to 4 m/s during an 8 second period of time. A. Determine the rate of acceleration of the car. B. How far will the car travel while slowing down.

  • 1) A motorcycle is following a car that is traveling at constant speed on a straight...

    1) A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 21.5 m/s , and the distance between them is 57.0 m . After t1 = 5.00 s , the motorcycle starts to accelerate at a rate of 4.00 m/s2 . The motorcycle catches up with the car at some time t2. a) How long does it take from the...

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