Answer:
c) 1.3 X 10⁵ N
Explanation:
<u>Step 1:</u> From equation of motion; V² = U² +2as
where, U and V are initial and final velocity respectively,
a is the acceleration and s is the distance traveled
(5400)² = 0² +2*a*193
a = (5400)²/ (386)
a = 75544.04 m/s²
<u>Step 2:</u> calculate the maximum force applied to the meteor
= 211,523.312 N
<u>Step 3:</u> calculate the average force applied to the meteor
= 105,761.7 N
1.1 X 10⁵ N
The nearest option is C
Answer:
μ = .4842
Explanation:
Assuming constant acceleration and the object is sliding on a level surface:
Let's start off by finding the acceleration of the object.
- v₀ = 19 m/s
- v = 0 m/s
- Δx = 38 m
- a = ?
v² = v₀² + 2aΔx
- 0² = 19² + 2a(38)
- 0 = 361 + 76a
- -361 = 76a
- a = -4.75 m/s²
Now, we can make a free-body diagram and see that the only force opposing the object's motion is the friction force -- this is the only force in the x-direction.
We can use Newton's 2nd Law: F = ma to solve for the coefficient of friction.
F = ma
- F = friction force = μ * N = μ * mg
Now, we have:
The mass cancels out and solving for the coefficient of friction gives us:
We know the acceleration is -4.75 m/s² and g = -9.81 m/s²:
- μ = -4.75/-9.81
- μ = .4842
The coefficient of kinetic friction between the surfaces, assuming constant acceleration and a flat surface, is 0.4842.
All metals are solid at (our) living temperatures except for mercury which is a liquid. Metals are shiny for a while at least when properly finished. Metals are good conductors of both heat and electricity. This is due to the excess electrons in their valence clouds that facilitate energy transfer.What are 5 characteristics of metal?
Metals are lustrous, malleable, ductile, good conductors of heat and electricity
Silver conducts electricity better than any other metal.
Brass is an alloy made from zinc and copper.
Pure gold is too soft for many things so most gold is combined with other metals to make it stronger. ...
World time periods are often listed by the metal used.
Hello!
Brass is a Homogeneous mixture.
Homogeneous mixtures are those in which the components are in the same proportions in all the sample. In brass, as the two metals are fused together to form an alloy, the composition is the same in the entire piece. Brass is also called a Solid Solution. Brass is not a pure substance because it has two different elements in its composition.
Have a nice day!
We are given a skater who coasts only around 65 degrees of the circle. The magnitude of the vector is determined by converting 65 degrees to radians:
65//180 = 0.36 radians
The displacement of the vector is 65 degrees east.
