Question

A motorist traveling with a constant 15m/s passes a school crossing conner where the speed limit is 10m/s,just as a motorist passes RTSA officer of a motor cycle stoped at a conner,start off in pursuit with constant acceleration of 3m/s^2.
(a) how much time elapses before the officer catches up the motorist?
​

Answer 1

Answer:

The answer is 5 seconds;

Explanation:

a) We know that the speed(V) is 15 m/s and acc. (a) is 3 m/s^2

b) The formula for the acceleration is  a=$\frac{V}{t}$;

Using this formula we can define the next equation:

3 =  $\frac{15}{t}$ , where  t is the sought time. After solving the equation we get that t is 5;