Answer:
a) Ws = 2.548 J
b) Wf = 1.153 J
c) v = 1.923 m / s
Explanation:
a) The work done by the spring force
Ws = ½ * k * x²
Ws = ½ * 260 N/m *0.14² m
Ws = 2.548J
b) The increase in thermal energy can by find using
Et = Wf
Wf = µ * m *g * x
Wf = 0.42 * 2.0 kg *9.8 m/s² * 0.14m
Wf = 1.153 J
c) The speed just as the block reaches can by fin using
EK = Ws + Et
Ek = ( 2.548 + 1.153 ) J = 3.7 J
Ek = ½ * m * v²
v² = 2* Ek / m
v = √[2 * 3.7 J / 2.0 kg]
v = 1.923 m / s
Answer:
A. The sum of all the forces acting on an object.
<u>Answers</u>
Line 1: The spacing is the same. Uniform
Line 2: The spacing is increasing.
Line 3: The spacing is decreasing.
<u>Explanations</u>
The dots seems to be the one made by a ticker tape timer. A device that used to find the velocity/acceleration of bodies at a short distances.
Line 1
When you look at the space between the dots in line 1, you will see that the gaps are uniform. The distances between the dots are the same. If the dots were from a ticker time, then it would represent a constant velocity.
Line 2
The spaces from the left are be coming bigger as you move to the right. That is the spacing is increasing. If it is from a ticker time, these would represent an increasing velocity.
Line 3
The spaces are decreasing from left to right. That is the distance is becoming smaller. For a ticker timer is could mean a decreasing the velocity.
A method to prove if the statement is true is by trial and error method. Since we are already given different sets of values, we can try to see if they match the given conditions: (consecutive, odd integers):
Looking at the choices:
A. consecutive odd integers (OK)
(-7) + (-9) + (-11) = -27
Since the integers in choice A match the statement, then choice A is the correct answer.
Higher temperatures means more energy, and a solid phase means the particles are close together. This results in highly energized particles that bump into the particles close to them, who in turn bump into more particles.