Distance=average velocity x time =((12+8)/2) x 3 =30m
Answer:
Explanation:
The forces acting on the crates when the train starts stopping are their weights, the normal force from the train, the static frictional force and the fictional force that is produced by the deceleration of the train. As the gravitational force, this fictional force is equal to the mass of the crates multiplied by the magnitude of the acceleration of the train. So, the equations of motion of the crates will be:
Since the static frictional force is , we get:
So we have a limit to the acceleration of the train. Now, we have to know the distance traveled by the train when it is stopping. Then, we use the kinematic formula:
Now we solve for the acceleration to combine this equation to the inequality we got before:
And solve for x:
Since we are looking for the minimum value for x, we consider the case in which that inequality becomes an equation:
Before we finish, we have to convert the unities of the initial velocity to meters per second:
Finally, we plug in the known values to get :
It means that the train can be stopped at a minimum distance of 36.2m at constant acceleration without causing the crates slide over the floor.
A lower, easier gear, with the smaller chain ring up front and a largercog in the back, lets you accelerate faster.
Answer:
Explanation:
Intensity, Io = 14.5 W/m²
θ = 25°
By the law of Malus
I = 11.91 W/m²
Now the formula for the rms value of magnetic field is given by
Brms = 2.23 x 10^-7 tesla
Answer:
The Sun is the center of our solar system and makes up 99.8 percent of the mass of the entire solar system.
Explanatio