1.

A football of mass m, initiallyr at rest, is kicked so that leaves the foot at a speed 1.". If t represents the duration of the collision between the hall and the foot, which one of the following expressions determines the magnitude of the average force exerted on the ball? {3 mvt {3 mw't {3 [1I2}mv2 {3 [1r2}mv2rt {3 [1I2}mvt2 A sports car of mass m has the same kinetic energy as an SUV with a mass 4m as each is driven along the same road. Which vehicle, if either, has the larger momentum and how many times is the momentum larger? The momentum of the SUV is two times larger than that of the car. O The momentum of the SUV is four times larger than that of the car. The momentum of the car is two times larger than that of the SUV. O The momentum of the car is four times larger than that of the SUV. O The momentum of the SUV is eight times larger than that of the car