Answer:
The correct option is;
75 N
Explanation:
The given parameters are;
The angle of inclination of the ramp, θ = 42°
The gravitational force of the box = m × g = 112.1 N
Let 
represent the force of static friction acting on the box
Given that the box is at rest, we have
The component of the gravitational force acting along the inclined plane = The force of static friction acting on the box,
We have that the component of the gravitational force acting along the inclined plane = m × g × sin (θ) =
= m × g × sin (θ)
Substituting the values, gives;
= 112.1 × sin (42°) ≈ 75.0095409728
∴ The force of static friction acting on the box = ≈ 75 N
Well, Pumice and granite are about as different as a chipmunk and a jar of bacon fat. Pumice is a rock that is filled with small little holes. I don't know if you ever felt one of them before, but they ain't exactly smooth (matter a fact, that's what makes them special.They're used to peel dead skin. Especially good for bunyons). Granite's real smooth and gotta salt-n-pepper type look to it. Pumice is egg shaped, where granite is a little rocky. That's about all I got...you should look at em yourself if you need a little extra help. I hope I helped ya!
Answer:
The mechanical advantage of a wedge can be calculated by dividing the length of the wedge's slope by the wedge's width: The more acute, or narrow, the angle of a wedge, the greater the ratio of the length of its slope to its width, and thus the more mechanical advantage it will yield
The velocity, 50 m/s, has two components - vertical and horizontal velocities.
The vertical component = 50 sin 30 = 25 m/s
The horizontal component = 50 cos 30 = 43.3 m/s
(a) Let t be the time taken for the vertical component to reach its peak from initial velocity = 25 m/s to its final velocity = 0.
Using the linear motion equation v = u - gt
0 = 25 - 10t
t = 2.5 s
Time taken to go up and down = 5 s
Time to hit the ground = 5 s
(b) Horizontal distance dealt x = 43.3 * 5 = 216.5 m
This is not the correct answer, but explains the problem thoroughly.
