Where f is force, m is mass, v is velocity, and t is duration of impact, what other information do you need in order to determine the force of the car at the impact

newton's second law helps here.

mass times star velocuty minus mass times end velocity divided by time = force.

short time ,,, hig force

long time lower force ... padding reduces shock ... impulse

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table