Answer:
a) a = 0 m / s²
, b) a = 0 ==> F = 0
, c) a = - 2 m / s²
,d) v = 4 m/s
Explanation:
a) It is asked to find the acceleration in the interval from 0 to 2s, from the graph we see that in this interval the velocity is constant with a value of 4 me / s, therefore the average eceleration is
a = (V₂ - V₁) / t
a = (4 -4) / 2
a = 0 m / s²
b) Newton's second law establishes a relationship between force and acceleration
F = m a
as acceleration is zero
a = 0 ==> F = 0
c) the acceleration in interval 2 a4 S
a = (0 - 4) / (4-2) = -4 / 2
a = - 2 m / s²
The negative sign iniquity the acceleration is slowing the movement
d) the force is
F = m a
F = 2 m
e) from the graph we can read the speed of the vehicle for time
v = 4 m / s
