Answer:
t = 0.96 s is the time it takes for the angle to reduce
Explanation:
In the launch of projectiles, the velocity is broken down into its x and y components, the velocity in the x-axis is constant, as there is no acceleration, instead the velocity in the axis and is reduced by the effect of the acceleration of gravity.
We can find Vox for the initial conditions
Voy = Vo sin θ
Voy = 29 sin 36
VoY = 17 m/s
Vox = Vo cos θ
Vox = 29 cos 36
Vox= 23.5 m/s
Vx = Vox
The velocity on the x axis is constant
By trigonometry, we find the firing angle
tan θ = Voy/ Vx
Vy = Vx tan θ
Vy = 23.5 tan 18
Vy = 7.64 m/s
Now that we have the vertical speed we can find the time
Vy = I'm going - g t
t = (Vy -Voy) / g
t = (17 - 7.64) /9.8
t = 0.96 s
Be the time it takes for the angle to reduce
Answer:
Their speed in a vacuum is a constant value.
Explanation:
Electromagnetic waves consits of oscillations of electric field and magnetic field. The oscillations of these fields occur in a direction perpendicular to the direction of propagation of the waves, so they are transverse wave. Electromagnetic waves, contrary to mechanical waves, do not need a medium to propagate, so they can also travel through a vacuum. In a vacuum, their speed is constant and has always the same value, the speed of light:
C, planets orbit around the sun because of gravity
The weight of 20 kg is
(mass) x (gravity) =
(20 x 9.8) = 196 newtons, downward.
There must be a force of 196 newtons upward on the mass.
Otherwise the mass is accelerating either up or down.
