Physical science question

Question

Preparing for a turn, a bus slows down with an acceleration of -2.0 m/s^2. Calculate how much time it takes the bus to slow down from 16.0 m/s to 5.0 m/s.

 

 

Answer 1

Use the formula

 

v_F = v_i + at

 

where:

v_F = final velocity

v_i = initial velocity

a = acceleration

t = time

 

Given:

v_F = 5 m/s

v_i = 16 m/s

a = -2 m/s²

 

 

If we rewrite the formula, we get

 

t = (v_F - v_i) / a

 

 

Plug in these value into the new form of the formula to solve for t.