What is the force constant of its rear suspension

In summary, the force constant of a rear suspension refers to the stiffness of the suspension system and is measured in Newtons per meter (N/m). It can be calculated by dividing the force applied to the suspension by the displacement or change in length of the suspension. Factors such as the type and quality of components, design and geometry, and weight and load of the vehicle can affect the force constant. The force constant is important because it affects the handling and stability of a vehicle. It can be adjusted by changing suspension components, but caution should be taken to maintain the overall balance and performance of the system.
  • #1
dg_5021
80
0
Problem-
A 110-kg box is loaded into the trunck of a car. If the higher of the car's bumber decreases by 13cm, what is the force constant of its rear suspension?

answer-

i know the formula is Fx= -k(x)
since Fx= 110 x 9.81
(110 x 9.81)/.13 =kN/m
i get = 8300.77
but the answer in the back of the book is 8.3kn/M
am i doing something wrong? please help
 
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  • #2
You have it absolutely correct.

8300 N/m = 8.3 kN/m

kN is kiloNewtons, ie 10^3 Newtons
 
  • #3
.

Your calculation is correct. The answer in the book is likely rounded to one significant figure, which would explain the difference. It is common for answers in textbooks to be rounded for simplicity. In this case, the answer of 8.3 kN/m is equivalent to your answer of 8300.77 N/m. Both are valid representations of the force constant of the rear suspension.
 

1. What is the force constant of its rear suspension?

The force constant of a rear suspension refers to the stiffness of the suspension system. It determines how much force is required to compress or extend the suspension. It is usually measured in units of Newtons per meter (N/m).

2. How is the force constant of a rear suspension calculated?

The force constant of a rear suspension can be calculated by dividing the force applied to the suspension by the displacement or change in length of the suspension. This can be represented by the formula k = F/x, where k is the force constant, F is the applied force, and x is the displacement.

3. What factors affect the force constant of a rear suspension?

The force constant of a rear suspension can be affected by various factors such as the type and quality of the suspension components, the design and geometry of the suspension system, and the weight and load of the vehicle. Other factors like temperature and wear and tear can also impact the force constant over time.

4. Why is the force constant of a rear suspension important?

The force constant of a rear suspension is important because it determines the overall handling and stability of a vehicle. A higher force constant means a stiffer suspension, which can provide better control and handling during turns and bumps. On the other hand, a lower force constant can result in a softer ride but may sacrifice handling and stability.

5. Can the force constant of a rear suspension be adjusted?

Yes, the force constant of a rear suspension can be adjusted by changing the components or design of the suspension system. For example, changing the type or stiffness of the springs or shocks can alter the force constant. However, it is important to note that these adjustments should be done carefully to maintain the overall balance and performance of the suspension system.

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