Question

Q4 you A bird begins to accelerate at a constant 0.3 m/s for 3 s. Its change in

velocity is
A. 0.9 m/s B. 1.5 m/s C. 1.95 m/s D.2.4 m/s

Answer 1

• From first newtons equation of linear motion:

`{ \boxed{v = u + at}}`

• from that equation, let's get the relation for the change in velocity;

`(v - u) = at \\ { \boxed{ \boxed{\delta v = at}}}`

• a is the acceleration, a = 0.3 m/s and t is time, t = 3s

`\delta v = (0.3 * 3) \\ { \underline{ \underline{ \delta v = 0.9 \: \: m {s}^( - 1) }}}`

Answer: A. 0.9 m/s