Asoccer player kicks a soccer ball of mass 0.40 kg that is initially at rest. the player's foot is in contact with the ball for 2.2 multiplied by 10-3 s. the force of the kick is given by the following formula for 0 t 2.2 multiplied by 10-3 s, where t is in seconds. f(t) = [(7.4 multiplied by 106)t - (2.8 multiplied by 109)t2] n (a) find the magnitude of the impulse imparted to the ball. incorrect: your answer is incorrect. n

In all trials, the magnitude of the final velocity for g1 + g2 was less than the magnitude of any initial velocity. as mass increased, what happened to the velocity? the velocity decreased. the velocity increased. the velocity of g1 + g2 could not be measured. the velocity was not affected by the mass increase.

Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?