Kim and julio go to a raceway to watch julio’s older brother, raul, compete. raul’s car covers the 2.5 km in 12 seconds, reaching a speed of 180 km/h. use the equation below to determine the rate of acceleration of raul’s car. in this equation, a is acceleration, vf is the final velocity, vi is the initial velocity, and t is time. (hint: the initial velocity is 0 km/h.)
a. what is the final velocity of raul's car?
b. what is the initial velocity of raul's car?
c. what was the total time raul's car traveled?
solve for the acceleration of raul's car.

If the speed of a particle triples ,by what factor does its kinetic energy increase?

1.in one challenge on the titan games, competitors have to lift 200 pounds up a long ramp. angel is able to move the weight in 42 seconds. anthony gets it done in only 38 seconds. which statement is true? angel has more power than anthony. angel does more work than anthony. anthony does more work than angel. anthony has more power than angel. 2.a mountain climber exerts 41,000 j of work to climb a cliff. how much power does the climber need if she wants to finish in only 500 seconds? power = work / time 20,500,000 watts 82 watts 0.0122 watts 41,500 watts 3.your family is moving to a new apartment. while lifting a box 83 joules of work is done to put the box on a truck, you exert an upward force of 75 n for 3 s. how much power is required to do this? (hint: you only need two of the 3 numbers given! ) power = work / time 249 watts 25 watts 2075 watts 27.7 watts

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law