Problemas
2. In recoil __ Choose all correct answers. D objects always have the same mass D the total momentum before and after is the same kinetic energy is conserved D momentum is conserved D objects always have the same velocity
Roztwór
Gisela
élite · Tutor durante 8 años
4
(160 Votos)
Respuesta
The correct answers are B and D.
Explicación
## Step 1The problem is about the principle of conservation of momentum, which is a fundamental concept in physics. The principle states that the total momentum of a system remains constant if no external forces are acting on it.## Step 2The first statement, "objects always have the same mass", is not necessarily true. The mass of an object can vary depending on the context.## Step 3The second statement, "the total momentum before and after is the same", is true. This is the essence of the conservation of momentum.## Step 4The third statement, "kinetic energy is conserved", is not necessarily true. While kinetic energy can be conserved in certain situations, such as elastic collisions, it is not always conserved.## Step 5The fourth statement, "momentum is conserved", is true. This is the principle of conservation of momentum.## Step 6The fifth statement, "objects always have the same velocity", is not necessarily true. The velocity of an object can vary depending on the context.