Purchase Solution

Finding Acceleration

Not what you're looking for?

Ask Custom Question

Hi, I need some assistance completing the following questions:

A car starting from rest moves with a constant acceleration of 2 m/s^2 for 10 s, then travels with constant speed for another 10 s, and then finally slows to a stop with constant acceleration of -2 m/s^2. How far does it travel?
a. 400 m
b. 100 m
c. 500 m
d. 300 m
e. 200 m

A car with good tires on a dry road can accelerate at about -4.5 m/s^2 when braking. If the car is traveling at 22.0 m/s when the brakes are applied, how far does the car travel before it slows to 10 m/s?
a. 85.3 m
b. 66.7 m
c. 53.8 m
d. 42.7 m

Purchase this Solution
Solution Summary

This solution is comprised of a detailed, step by step response which illustrates how to solve both of these physics-based questions. In order to view the response, a Word document file needs to be opened.

Solution Preview

Please refer to the attachment.

For the first question, the answer is A.

How to get this answer?
We consider three time intervals

1) [0,10s]
In this interval, a car ...

Solution provided by:
Changping Wang, MA
Education
  • BSc , Wuhan Univ. China
  • MA, Shandong Univ.
Recent Feedback
  • "Your solution, looks excellent. I recognize things from previous chapters. I have seen the standard deviation formula you used to get 5.154. I do understand the Central Limit Theorem needs the sample size (n) to be greater than 30, we have 100. I do understand the sample mean(s) of the population will follow a normal distribution, and that CLT states the sample mean of population is the population (mean), we have 143.74. But when and WHY do we use the standard deviation formula where you got 5.154. WHEN & Why use standard deviation of the sample mean. I don't understand, why don't we simply use the "100" I understand that standard deviation is the square root of variance. I do understand that the variance is the square of the differences of each sample data value minus the mean. But somehow, why not use 100, why use standard deviation of sample mean? Please help explain."
  • "excellent work"
  • "Thank you so much for all of your help!!! I will be posting another assignment. Please let me know (once posted), if the credits I'm offering is enough or you ! Thanks again!"
  • "Thank you"
  • "Thank you very much for your valuable time and assistance!"
Purchase this Solution
Free BrainMass Quizzes
Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

The Moon

Test your knowledge of moon phases and movement.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

View More Free Quizzes
Related BrainMass Solutions

  • Finding accceleration

    Thanks This solution explains the concept of finding acceleration by using calculus. Step by step solution is provided to explain the same.

  • Finding the magnitude of horizontal net force

    96545 Finding the magnitude of horizontal net force A 1580 kg car is traveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 50.0 m?

  • Acceleration of skateboarder rolling down a ramp

    So the acceleration parallel to the ground is It shows step-by-step solutions of finding the acceleration of a skateboarder rolling down a ramp when the speed at the bottom of the ramp is known.

  • Block sliding without friction in a rotating arm.

    We solve (b) by finding the relative acceleration of the block with respect to arm in radial direction.

  • Finding the Acceleration of a Mass on a Frictionless Pulley

    357969 Finding the Acceleration of a Mass on a Frictionless Pulley A 2.0 kg mass and a 5.0 kg mass are attached to a lightweight cord that passes over a frictionless pulley. The hanging masses are free to move.

  • Velocity-time Graph

    can draw the following information from a velocity-time graph: acceleration at any instant by finding the slope of the graph at the given instant; displacement of the body during a given interval of time; average velocity during a given interval of time

  • Understanding Velocity-time Graphs and their Interpretation

    (b) Acceleration during first 4 s is calculated by finding the ratio of change in velocity to the the time. a =(60 - 0)/4 = 15 metre per second squared. This is acceleration at 2s.

  • Energy Transfer in Mechanical Systems

    Solution attaches a Word document showing the calculations necessary for finding the combined linear and kinetic energy of a wheel after acceleration.

  • Circualr Motion

    What is its radial acceleration in m/s^2. rad. accel. = a = v^2/r = 80 m/s^2 The solution provides calculations for various circular motion problems, including those for finding angular velocity, linear speed, and radial acceleration.

  • Rotational mechanics applied to the motion of a wheel

    4179 Rotational Mechanics: Finding the angle of rotation. The wheel of a motor, accelerated uniformly from rest, rotates through 2.5 rad during the first second. Find the angle rotated during the next second. The angular acceleration is constant.

View More Related Solutions