1) What is momentum?  a) The sum of mass and velocity: p = m + v b) The product of mass and velocity p = m x v c) The ratio of mass and velocity p = m / v 2) What is the unit of momentum? a) Newtons per kilogram ( N/kg) b) Kilogram meters per second (kg m/s) c) Newtons per meter (N/m) 3) What is the momentum of a 15kg dog running ar 4m/s? a) 3.25 kg m/s b) 19 kg m/s c) 60 kg m/s 4) What does conservation of momentum mean? a) Total momentum before is equal to total momentum after b) Total momentum must decrease after a collision c) All objects must start with some momentum 5) What is the momentum of a system at rest? a) Infinite b) 1 kg m/s c) 0 kg m/s 6) What does rate of change mean? a) Total amount of change b) Average change c) Change per unit time 7) Which car safety feature will not reduce the rate of change of momentum? a) Roll cage b) Airbag c) Crumple zone 8) How do seatbelts and airbags reduce forces in a collision? a) They increase the collision time, which increases the rate of change of momentum b) The increase collision time, which reduces the rte of change of momentum c) They decrease collision time, which reduces the rate of change of momentum

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