9. To completely describe the motion of an object, you need
2 answers:
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1. Find the amount of time the dart is in the air using the equation dy...
2. Vy initial is 0, and the only force acting on the dart while it is in the air is gravity so the acceleration of the dart in the y direction is 9.8.
3. Plug in the time you found and Vx = 12.9 to get Dx
2. Vy initial is 0, and the only force acting on the dart while it is in the air is gravity so the acceleration of the dart in the y direction is 9.8.
3. Plug in the time you found and Vx = 12.9 to get Dx
The initial velocity of the bird before the gust of wind : <u>4 m/s</u>
<h3>Further explanation</h3>An equation of uniformly accelerated motion
v = vo + at
Vt² = vo² + 2a (x-xo)
x = distance on t
vo/vi = initial speed
vt/vf = speed on t /final speed
a = acceleration
Acceleration is a change in speed within a certain time interval
a = Δv /Δ t
Let complete the task :
A bird is flying to the right when a gust of wind causes the bird to accelerate leftward at 0.5 m/s² for 3 s. After the wind stops, the bird is flying to the right with a velocity of 2.5 m/s.
Assuming the acceleration from the wind is constant, what was the initial velocity of the bird before the gust of wind?
we can use formula :
vf = vi + a.t
vf = final velocity = 2.5 m/s
vi = asked
a = - 0.5 m/s²(leftward=negative)
t = 3 s
then :
The car reach the end of the road
Keywords: uniformly accelerated motion, distance, velocity, acceleration
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