Answer:
Explanation:
Given
Mass of crate is m=574 kg
The crate is raised up to a height of 1.3 m
time taken t=2 s
Work done to raise the crate is equal to the change in its potential energy
Answer:
When two forces acting on an object are equal in size but act in opposite directions, we say that they are balanced forces.
Explanation:
Answer:
a) angle θ = 53.1º, b) V = 15 i ^ m/s, a = - 9.8 j ^ m/s² c) Y = 15.9 m
Explanation:
a) In the problem they indicate that we treat the drops of water like projectiles, as they give us the time it takes to travel distance we can find the horizontal speed
Vox = X / t
Vox = 45.0 / 3.00
Vox = 15 m / s
They also indicate the speed of water 25m / s, we calculate the angle
Vox = Vo cos θ
Vo cos θ = 15
Cos θ = 15 / Vo
θ = cos⁻¹ (15 / vo) = cos⁻¹ (15/25)
θ = 53.1º
This is the elevation angle.
b. At the highest point the vertical speed must be zero (Vy = 0), the constant horizontal speed since there is no acceleration on this axis and the only acceleration acting on the body is the acceleration of gravity
V = Vox i ^ = 15 i ^ m / s
a = -g j ^ = - 9.8 j ^ m /s²
Where the negative sign indicates that the acceleration is towards the center of the earth
c. The water takes to reach the building 3 s let's calculate the height
Y = Voy t - ½ g t²
Voy = Vo sin θ
Voy = 25 sin 53.1
Voy = 20 m / s
Y = 20 3 - ½ 9.8 3²
Y = 15.9 m
Answer:
Yes
Explanation:
I've done plenty of research by hitting myself repeatedly. It does hurt after awhile.
B.Electromagnetic
explanation: