Answer:
The horizontal reaction force is 230.3 N.
Explanation:
Given that,
Length l= 14.0 m
Weight of ladder F = 490 N
Angle = 65°
Weight of firefighter F'= 850 N
Height l'= 4.10 m
Suppose horizontal force magnitude N direction vertical force magnitude N direction
We need to calculate the horizontal reaction force
Horizontal reaction force = normal reaction from wall
Vertical reaction force = weight of ladder +weight of man
We need to calculate the moment about bottom is zero
Put the value in the equation
Hence, The horizontal reaction force is 230.3 N.
A longitudinal wave can be created in a slinky if the slinky is stretched out in a horizontal direction and the first coils of the slinky are vibrated horizontally. In such a case, each individual coil of the medium is set into vibrational motion in directions parallel to the direction that the energy is transported.
Hope it helped :))
Metallic bonds! Hope this helps!! :))
Answer:
Explanation:
Assuming the squirrel is jumping off the ground, here's what we know but don't really know...
v₀ = 4.0 at 50.0°
So that's not really the velocity we are looking for. We are dealing with a max height problem, which is a y-dimension thing. Therefore, we need the squirrel's upward velocity, which is NOT 4.0 m/s. We find it in the following way:
which gives us that the upward velocity is
v₀ = 3.1 m/s
Moving on here's what we also know:
a = -9.8 m/s/s and
v = 0
Remember that at the very top of the parabolic path, the final velocity is 0. In order to find the max height of the squirrel, we need to know how long it took him to get there. We are using 2 of our 3 one-dimensional equations in this problem. To find time:
v = v₀ + at and filling in:
0 = 3.1 - 9.8t and
-3.1 = -9.8t so
t = .32 seconds.
Now that we know how long it took him to get to the max height, we use that in our next one-dimensional equation:
Δx = and filling in:
Δx = and using the rules for adding and subtracting sig fig's correctly, we can begin to simplify this:
Δx = .99 - .50 so
Δx = .49 meters