Momentum

Cards (8)

What do all moving objects have?
Momentum . But if the object is not moving then its momentum is zero
What is the equation for momentum?
Momentum = Mass x velocity
What happens when an unbalanced force acts on an object that is moving or able to move?
A change in momentum occurs
What is the equation for change in momentum?
Force = change in momentum / time which the changes takes place
What is the role of safety devices linking to momentum?
They reduce the force by increasing the time over which the change in momentum takes place
Describe how gym crash mats are used as safety devices?
They cushion the impact of someone falling. They increase the time it takes for someone to come to rest when they fall onto the floor
What is the conservation of momentum?
In a closed system, the total momentum before an event is equal to the total momentum after the event
Conservation of momentum applies to collisions , rockets and projectiles