Kinematics Problem Homework Help

In summary, the conversation discusses the calculation of the average speed of a car traveling 99 km in 49.5 km/h for the first 49.5 km. The solution requires consideration of time and the relevant equations were not provided. The final question is whether SteamKing's response sufficiently addressed the issue or if there are still unanswered questions.
  • #1
mpoole
1
0
1. A car making a 99-km journey travels 38 km/h for the first 49.5 km. How fast must it go during the second 49.5 km to average 47 km/h?



2. Homework Equations ?



3. 47=.5(38+x)
 
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  • #2
You need to consider time in your solution. For example, if the average speed is 47 km/h and the distance traveled is 99 km, how long should this take to occur?
 
  • #3
Welcome to PF;
You didn't provide a lot of information - i.e. the "relevant equations" section is not filled in.
It is difficult to know what sort of reply will best fit your need.
From the unfinished calculation in section 3, we can make a guess but we could guess wrong.

Did you have a specific question for us or did SteamKing manage to cover it?
 

FAQ: Kinematics Problem Homework Help

1. What is kinematics and why is it important?

Kinematics is a branch of physics that studies the motion of objects without considering the forces that cause the motion. It is important because it helps us understand and describe the motion of objects, which is essential in fields such as engineering, biomechanics, and robotics.

2. How do you solve kinematics problems?

To solve kinematics problems, you need to have a good understanding of the basic equations of motion, such as displacement, velocity, and acceleration. You also need to know how to apply these equations to different scenarios, such as constant velocity or accelerated motion. It is important to draw a clear diagram and label all known and unknown variables before solving the problem.

3. What are the common types of kinematics problems?

The most common types of kinematics problems involve finding the position, velocity, or acceleration of an object at a given time or solving for the time it takes for an object to reach a certain position or velocity. Other types of problems may involve projectile motion, circular motion, or relative motion between two objects.

4. How do you use kinematic equations to solve problems?

Kinematic equations are mathematical formulas that describe the relationship between the different parameters of motion, such as displacement, velocity, and acceleration. To solve problems using these equations, you need to identify the known and unknown variables and select the appropriate equation to solve for the unknown variable. It is also helpful to use units consistently and check your answer for reasonableness.

5. What are some common mistakes when solving kinematics problems?

Some common mistakes when solving kinematics problems include using the wrong equation, not considering the direction of motion, and not converting units correctly. It is also important to pay attention to significant figures and round your final answer to the appropriate number of digits. Additionally, it is important to check your calculations and make sure your answer makes sense in the context of the problem.

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