Answer: yea ma’am I’m sorry but you still
Answer:
The friction force and the x component for the weight should be the reaction forces that are opposite and equal to the action force, which causes the locomotive to move up the hill if the velocity of the locomotive remains constant.
Explanation:
<u>When the locomotive starts to pull the train up, appears two reaction forces opposed to the action force in the direction of the move. </u>
The first one is due to the friction between the wheels and the ground, it will be the friction force (Fr):
Fr = μ*Pₓ =μmg*sin(φ)
<em>where μ: friction dynamic coefficient, Pₓ: is the weight component in the x-axis, m: total mass = train's mass + locomotive's mass, g: gravity, and sin(φ): is the angle respect to the x-axis.</em>
And the second one is the x component for the weight (Wₓ):
Wₓ = mg*cos(φ)
<em>where cos(φ): is the angle respect to the y-axis. </em>
<em> </em>
These two forces should be the same as the action force, which causes the locomotive to move up the hill if the velocity of the locomotive remains constant.
Answer:
a. 11.3 units
b. 46.031°
c. 11.3 units
d. 46.03°
Explanation:
a. magnitude
B = 
= √15.7² - 10.9²
= √127.68
= 11.3 units
b. direction
θ = cos⁻¹(10.9units/15.7 units)
= 46.031⁰ north of west
c. thge magnitude at 15.7 units is the same as solution a above
15.7² = 10.9² + B²
B = 11.3 units.
d. the direction is same as answer b.
θ = 46.031°
but the vector faces south of west
Answer:
The correct answer is: no definite shape or definite volume
Explanation:
The main characteristics of the gaseous state are:
-No form and no defined volume (occupy the space of the container that contains them)
-Low density
-Can be compressed easily (high compressibility)
-Gas molecules have high kinetic energy
