I need help with some question. Please correct me if I naswered these wrong.
1. Assuming two objects are moving with the same velocity but one has a mass of 90 kg and the other has a mass of 45 kg, which object has the greater momentum? Explain.
The object with the mass of 90 kg has the greater momentum because the greater mass causes it to have a heavier force when moving comapred to the lower mass one.
2. Assume two objects, with the same amount of mass, are moving with the same velocity. How could the momentum of either object be changed?
The momentum of either object could be changed depending on type of collusion. They could either crash, pull, or push each other.
1. You answered the first question correctly. The object with a mass of 90 kg has greater momentum because momentum depends on both mass and velocity. Since both objects have the same velocity, the object with greater mass will have greater momentum. This is because momentum is directly proportional to mass.
2. Your answer to the second question is partially correct. The momentum of either object can indeed be changed depending on the type of collision. Collisions can be elastic or inelastic. In an elastic collision, the objects bounce off each other and their total momentum is conserved. In this case, the momentum of either object can be changed by altering their velocities before and after the collision. In an inelastic collision, the objects stick together or deform upon collision, and their total momentum is still conserved. In this case, the momentum of either object can be changed by altering their velocities, masses, or by applying external forces.
1. Your answer to question 1 is incorrect. Momentum is actually defined as the product of an object's mass and its velocity, so it depends on both factors. The formula for momentum is p = mv, where p represents momentum, m represents mass, and v represents velocity. In this case, since both objects have the same velocity, the one with the greater mass will indeed have the greater momentum. So, the object with a mass of 90 kg will have a greater momentum compared to the object with a mass of 45 kg.
2. Your answer to question 2 is partially correct. The momentum of an object can indeed be changed by collisions, but it's important to note that there are two types of collisions: elastic and inelastic. In an elastic collision, the total momentum of the system is conserved, meaning that the sum of the individual momenta before the collision equals the sum of the individual momenta after the collision. In this case, the momenta of both objects would change, possibly resulting in a redistribution of momentum between them. In an inelastic collision, however, the total momentum of the system is not conserved, meaning that the sum of the individual momenta before the collision does not equal the sum of the individual momenta after the collision. In this case, the momenta of both objects would change, possibly resulting in an accumulation or loss of momentum. Additionally, objects can also have their momentum changed by external forces such as pushing or pulling, as you mentioned.