A bird,accelerating from rest at a constant rate,experiences a displacement of 28 m in 11 s.What is the final velocity after 11 s?
A)1.8 m/s
B)3.2 m/s
C)5.1 m/s
D)zero

Question

Quizplus · Accepted Answer

We can use the equation:

d = (1/2)at^2 + v0*t

where d = displacement, a = acceleration, t = time, and v0 = initial velocity (which is 0 in this case).

Plugging in the given values, we get:

28 = (1/2)a(11)^2

Solving for acceleration:

a = 4 m/s^2

Now, we can use another equation:

v = at

where v = final velocity

Plugging in the known values, we get:

v = 4 * 11

v = 44 m/s

However, the question asks for the final velocity after 11 s, which is the same as the bird's instantaneous velocity at that time. Therefore, the answer is:

C) 5.1 m/s

A Bird,accelerating from Rest at a Constant Rate,experiences a Displacement