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The momentum of an object can be calculated by multiplying mass times acceleration.
mass times velocity
A pulley is a hard or rigid bar that rests on support called fulcrum.
a lever
Centripetal force is the force that acts parallel to the velocity of an object.
perpendicular to
Using arrows describe the forces acting on the roller coaster train, mentioning the effect of changing the speed of the car on the centripetal force.
centripital force arrow to the center, velocity to the right. as velocity inc. centripetal force inc.
