A) Calling F the intensity of the horizontal force and d the displacement of the block across the floor, the work done by the horizontal force is equal to
b) The work done by the frictional force against the motion of the block is equal to:
Part of these 105.1 Joules of work becomes increase of thermal energy of the block (
), and part of it becomes increase of thermal energy of the floor (
). We already know the increase in thermal energy of the block (38.2 J), so we can find the increase in thermal energy of the floor:
c) The net work done on the block is the work done by the horizontal force F minus the work done by the frictional force (the frictional force acts against the motion, so we must take it with a negative sign):
For the work-energy theorem, the work done on the block is equal to its increase of kinetic energy:
So, we have
Answer:
absorbs heat and its kinetic energy increases.
Explanation:
As we know that heat is defined as the change in the temperature as there is increase in the temperature change then the heat will increase or decrease with respect to increase or decrease in temperature change.
In the given, question temperature is changing from 20° to 50° which means there is increase in the temperature which results in the absorption of heat. And increase temperature will increase the average speed of the molecules which results in increase in kinetic energy.
Answer:
The magnitude of force on P is 2.75 N
The magnitude of force on Q is 7.15 N
Solution:
As per the question:
Mass of the object, M = 11.0 kg
Acceleration of the object when the forces are directed leftwards, a =
Acceleration when the forces are in opposite direction, a' =
Now,
The net force on the object in first case is given by:
(1)
The net force on the object in second case is given by:
(2)
Adding both eqn (1) and (2):
Putting the above value in eqn (1):
Answer:
They investigated Hooke's law.
Explanation:
The answer is B! Hoped o helped !have gray day I did Clase de AP – Unidad 2 Hoy es el 18 de noviembre
1.A.1: Identify the main idea.
2.A.1: Identify and/or describe content and connections among cultural topics. 4.A.2: Deduce the meaning of unfamiliar words or expressions
5.A.3: Provide and obtain relevant information in spoken exchanges.
Pregunta esencial:
1. ¿Como defines la belleza?
•
Calentamiento
asignacion en Teams)
el 19 de noviembre (Escribe en la
• ¿Cuál es la importancia de la moda en la vida social de las personas?
¿Cual es el impacto de la moda en la economia del individuo?
Tema de la unidad: La belleza y la estética