1 3 momentum

False. Momentum is a vector quantity as it has both magnitude and direction.

Momentum is the product of an object's mass and velocity.

False. An object at rest has zero velocity, so zero momentum.

The equation of momentum is Where:

True. Momentum can be either positive or negative because it is a vector quantity.

The three conditions under which the momentum of an object will change are:

The principle of conservation of momentum states that the total momentum before an interaction equals the total momentum after the interaction, if no external forces are acting on the objects.

False. The conservation of momentum applies to systems of objects, which can include one or multiple objects.

Momentum is conserved in a collision if there is no net external force acting on it, and energy within the system remains constant.

Force is the rate of change of momentum on an object.

The equation for the change in momentum of an object is Where:

False. Acceleration is expressed as the change in velocity over time. Force can be expressed as the change in momentum over time.

The equation for force as the rate of change in momentum is Where:

A positive momentum before a collision and a negative momentum after a collision implies that the object has changed direction.

False. The shorter the time over which the momentum changes, the larger the force experienced by the object.

Newton's third law of motion states that whenever two objects interact, the forces they exert on each other are equal in magnitude and opposite in direction.

The three rules for identifying third law force pairs are:

True. The water bottle exerts a push force (reaction force) on the surface of the table and the table exerts a push force (reaction force) on the water bottle that is equal in magnitude but opposite in direction. This is an example of Newton's third law.

False. The weight force and the reaction force are both acting on the same object, the person, and the forces are different types (weight and reaction force). Therefore, this is not an example of Newton's third law.

True. The ball exerts a push force on the wall, and the wall exerts a push force on the ball that is equal in magnitude and opposite in direction. This is an example of Newton's third law.

False. If particle A collides with particle B, then the force exerted by A on B will be equal in magnitude but opposite in direction to the force exerted by B on A.

True. The force of an impact in a vehicle collision can be decreased by increasing the contact time over which the force acts.

Examples of safety features designed to reduce the impact of a force during a collision are:

An air bag inflates upon impact. The air bag increases the contact time over which the passenger's momentum changes to zero, and therefore decreases the force experienced by the passenger. This reduces the risk of injury to the passenger.

False. Safety features can reduce the risk of serious injury but cannot completely prevent it.