Chapter 6: Q.30 (page 155)

A 1500 kg car skids to a halt on a wet road where $μ_{k}$ $= 0.50$ . How fast was the car traveling if it leaves role="math" localid="1648126746388" $65 m$ -long skid marks?

Short Answer

Expert verified

The speed of the car at the moment it skidded is $25.69 m / s$

Step by step solution

Content Introduction

Velocity is a mechanical number that indicates the change in distance of an object in unit time in a specified direction. The metric unit is the meter per second. It explains how the thing moves.

Content Explanation

Using Newton's second law

Here, $F_{g}$ is the gravitational force, $m$ is the mass, $a$ is the acceleration.

Substitute the values, where

$m = 1500 k g a = 10 m / s$

$F_{g} = m a F_{g} = (1500) (10) F_{g} = 15000 N$

Now $F_{f} = μ F_{n} F_{f} = (0.5) (1500) F_{f} = 7500 N$

To find acceleration we use

$A = 5 m / s^{2}$

The initial velocity , here $V_{f} = 0, d = 65 m, a = 10$

$V_{f} = V_{i} + 2 a d 2 a d = V_{i} = 25.69 m / s$

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A 1500 kg car skids to a halt on a wet road where $μ_{k}$ $= 0.50$ . How fast was the car traveling if it leaves role="math" localid="1648126746388" $65 m$ -long skid marks?

Short Answer

Step by step solution

Content Introduction

Content Explanation

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A 1500 kg car skids to a halt on a wet road where μk=0.50. How fast was the car traveling if it leaves role="math" localid="1648126746388" 65m-long skid marks?

Short Answer

Step by step solution

Content Introduction

Content Explanation

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Physics Textbooks

Wave Optics

Geometrical and Physical Optics

Fluids

Famous Physicists

Mechanics and Materials

Thermodynamics

Study anywhere. Anytime. Across all devices.

A 1500 kg car skids to a halt on a wet road where $μ_{k}$ $= 0.50$ . How fast was the car traveling if it leaves role="math" localid="1648126746388" $65 m$ -long skid marks?