Respuesta :
Answer:
v=v0 - gt
Explanation:
The equation for velocity is
v=v0 - gt
where v0=14m/s, g=10m/s^2.
in 1 second:
v=14-10=4m/s
it is positive so direction is upwards
in 2 seconds:
v=14-20=-6m/s
it is negative so direction is downwards
The magnitude and direction of the velocity after 1 second and 2 seconds will be 3 m/sec and -7 m/sec,
What is velocity?
The change of distance with respect to time is defined as speed. Speed is a scalar quantity. It is a time-based component. Its unit is m/sec.
The given data in the problem is;
u is the initial velocity of fall = 13 m/sec
h is the distance of fall = m
g is the acceleration of free fall = 9.81 m/sec²
v₁ is the velocity after 1 second =?
v₂ is the velocity after 2 seconds=?
According to Newton's second equation of motion,
v =u+at
a)
The magnitude and direction of the velocity after 1 second will be;
v =u+at
v=13+(-10)1
v=3 m/sec
+ ve shows the motion of the body is downward.
b)
The magnitude and direction of the velocity after 2 seconds will be;
v =u+at
v=13+(-10)2
v= -7 m/sec
- ve shows the motion of the body is upward.
Hence the magnitude and direction of the velocity after 1 second and 2 seconds will be 3 m/sec and -7 m/sec,
To learn more about the velocity, refer to the link: https://brainly.com/question/862972.
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