Math Problem Statement

if a vehicle has a mass of 500kg and accelerates from 0 with a force of 800kN, what is the time for it to travel 403.3m?

Solution

To calculate the time it takes for the vehicle to travel 403.3m403.3 \, \text{m}, we need to use the given data and apply the kinematic equations. Let's break this problem into steps.


Given Data:

  1. Mass of the vehicle, m=500kgm = 500 \, \text{kg}
  2. Force applied, F=800,000NF = 800,000 \, \text{N} (converted from 800kN800 \, \text{kN})
  3. Distance traveled, s=403.3ms = 403.3 \, \text{m}
  4. Initial velocity, u=0m/su = 0 \, \text{m/s}

Step 1: Calculate Acceleration (aa)

Using Newton's second law: F=maF = m \cdot a a=Fm=800,000500=1600m/s2a = \frac{F}{m} = \frac{800,000}{500} = 1600 \, \text{m/s}^2


Step 2: Use the Kinematic Equation to Find Time (tt)

The kinematic equation is: s=ut+12at2s = ut + \frac{1}{2} a t^2 Since u=0u = 0, this simplifies to: s=12at2s = \frac{1}{2} a t^2 Substitute s=403.3ms = 403.3 \, \text{m} and a=1600m/s2a = 1600 \, \text{m/s}^2: 403.3=121600t2403.3 = \frac{1}{2} \cdot 1600 \cdot t^2 403.3=800t2403.3 = 800 t^2 t2=403.3800t^2 = \frac{403.3}{800} t2=0.504125t^2 = 0.504125 t=0.5041250.71st = \sqrt{0.504125} \approx 0.71 \, \text{s}


Final Answer:

The time it takes for the vehicle to travel 403.3m403.3 \, \text{m} is approximately: t0.71secondst \approx 0.71 \, \text{seconds}


Do you want a detailed explanation or further clarification?
Here are 5 follow-up questions related to this calculation:

  1. What would the time be if the force applied was doubled?
  2. How would the time change if the mass of the vehicle was increased to 1000 kg?
  3. What is the final velocity of the vehicle after traveling 403.3 m?
  4. How can this scenario be applied to real-world engineering problems?
  5. What assumptions are made in this calculation, and how could they affect the result?

Tip: Always check units and convert them to SI before performing calculations for consistency.

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Math Problem Analysis

Mathematical Concepts

Kinematics
Newton's Laws of Motion

Formulas

F = m * a (Newton's Second Law)
s = ut + 1/2 * a * t^2 (Kinematic Equation)

Theorems

Newton's Second Law of Motion

Suitable Grade Level

Grades 9-12