Answer:
c. The coefficient of kinetic friction is less than the coefficient of static friction
Explanation:
When the box finally does break loose. Then the component of the box weight which is parallel to the board weight parallel component, is equal to the .
For the box to acce;erate thee must be non-zero net force acting on the box parallel to the board. Or we can say,
Therefore the force of kinetic friction must be less than the force of static friction. Thus,
Answer:
The temperature rise is given as 21.35 K
Explanation:
The explanation is shown on the first second and third uploaded image
Answer:
Glassy texture
Explanation:
The rocks that are characterized by the absence of structure, shape, and size are usually referred to as the glassy texture. These rocks are comprised of atoms that are randomly oriented. These rocks are lacking in crystals because of their faster rate of cooling. It cools so fast that it does not get a sufficient amount of time to form crystals. For example, Obsidian.
This glassy textured rocks are found in the igneous types of rocks that are formed due to the cooling of magma.
Answer:
Explanation:
ME initial = ME final
PE initial + KE initial = PE final + KE final
There's no kinetic energy the moment Jorge is at the top of the ramp therefore KE initial = 0
PE initial = PE final + KE final
Assuming the bottom of the ramp is h = 0 we can then say PE final = 0
PE initial = KE final
Write the equations out.
mgh = (.5)mv^2
They tell us potential energy is 6000J therefore that portion of the equation is already "solved"
6000 = (.5)mv^2
Plugin the values
6000 = (.5) 70 v^2
Solve for v
6000 = 35v^2
171.43 = v^2
13.1 = v at the bottom of the slope
Solving for KE we get
(.5) m v^2
Plugin the value from the previous problem and solvee!
All the forces are balanced.
Hope This Helps You!
Good Luck Studying :)