Question

Question:

A race car slows with an average acceleration of –8.0 m/s2 (negative sign shows deceleration). The car’s initial velocity is 100.0 m/s, how far does it travel in 12.0 seconds? Explain how you arrived at your answer?
Use the equations

Answer 1

`624\:\mathrm{m}`

Step-by-step explanation:

We can use kinematics equation
`\Delta x =v_it+(1)/(2)at^2`.

What we're given:

• 
  `v_i` of 100.0 m/s
• 
  `t` of 12 s
• 
  `a` of -8.0
  `\mathrm{m/s^2}`

Solving for
`\Delta x`:

`\Delta x=100\cdot 12+(1)/(2)\cdot -8\cdot 12^2=\boxed{624\:\mathrm{m}}`