Physics, 04.10.2019 21:30 marquion

Aforce is path-dependent and will change an objects total mechanical energy

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Answer from: alexiaaaa234

The force which is dependent on a path and mechanical energy is changed or removed is a nonconservative force.

Explanation:

Nonconservative force is the force which is dependent on a path and potential energy is not associated with it. Mechanical energy is added or removed when work is done by a nonconservative force. The best example for a nonconservative force is friction.

Mechanical energy changes when these nonconservative forces are acted but these are not conserved. Let us tale an example, car losses kinetic energy when it is stopped by friction and dissipates this kinetic energy as thermal energy.

Answer from: Quest

What even is this. where is the question

Answer from: Quest

m₁v₁ + m₂v₂ = (m₁ + m₂)vmomentum is conserved.the left-hand side of the equation represents the momentum in the system before the collision.the right-hand side represents the momentum in the system after the collisionm₁ and v₁ represents the mass and the velocity of the physics blockm₂ and v₂ represents the mass and velocity of the ball of puttyv represents the final velocity of the combined mass.the question states the two masses stick together. they combined mass has its own velocity with the body mass the sum of the two objects' massestheir combined momentum is (m₁ + m₂)vto find the magitude of (m₁ + m₂)v, we need to add the vectors on the left-hand side of the equation: m₁v₁ + m₂v₂.note the diagram. i have positioned the vectors in accordance with their directions.the magnitude of the resultant can be calculated using the pythagorean theorem since this is a right triangle situation (north and west are perpendicular)|(m₁ + m₂)v| = √[ (m₁v₁)² + (m₂v₂)² ]|(m₁ + m₂)v| = √[ (1.5kg·8.0m/s)² + (0.40kg·20m/s)² ]|(m₁ + m₂)v| = 14.4 kg m/sfor two significant figures (assuming that 20m/s is two), this rounds to 14 kg m/s

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Aforce is path-dependent and will change an objects total mechanical energy...

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