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

Answer:

$624\:\mathrm{m}$

Explanation:

We can use kinematics equation $\Delta x =v_it+\frac{1}{2}at^2$.

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 $\Delta x$:

$\Delta x=100\cdot 12+\frac{1}{2}\cdot -8\cdot 12^2=\boxed{624\:\mathrm{m}}$