Question

A cyclist going downhill is accelerating at 1.2 m/s2. If the final velocity of the cyclist is 16 m/s after 10 seconds, what is the cyclist’s initial velocity?
4 m/s
12 m/s
18 m/s
20 m/s

Answer 1

Answer:

4 m / sec

Explanation:

Given :

Final velocity v = 16 m / sec

Acceleration a = 1.2 m / sec²

Time t = 10 sec

We are asked to find initial velocity u :

Using first equation of motion :

v = u + a t

= > u = v - a t

Putting values here we get :

= > u = 16 - 1.2 × 10 m / sec

= > u = 16 - 12 m / sec

= > u = 4 m / sec

Therefore , cyclist’s initial velocity is 4 m / sec.

Answer 2

Answer:

the answer is 4m/s

Explanation:

acceleration (1.2) multiplied by time (10 seconds) gets you 12

then you do 16 (final velocity) subtracted by 12 and get 4!