A quarterback can throw a 0.430 kg football at 75 m/h. a. How much kinetic energy does the quarterback have to give to the
ball in order to give it that much kinetic energy?

Explanation:

Step one:

given data

mass of ball m=0.43kg

speed v= 75m/h >>>>> to m/s = 75*0.00027

         v =0.021m/s

Required

the kinetic energy KE

Step two

applying

KE= 1/2mv^2

KE= 1/2*0.43*(0.021)^2

KE= 0.5*0.43*0.0004.41*10^-4

KE=0.000094815

KE=9.48*10^-5J

The kinetic energy is 9.48*10^-5J

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

answer

a 75kg dining table

the design of a ski jumping suit involves a trade-off between giving the skiers lift to get higher jumps and ensuring the skier does not face a lot of drag before the jump itself. an expansive suit may to lift the skier higher, but at the same time, it will also increase the air resistance. higher air resistance as the skier goes down the slope limits the speed of the jump. a big suit also increases the risk of losing balance or control, especially if there's a strong gust of wind. while technologically enhanced suits a lot, clothing is not the only factor in a ski jumper’s success. gathering speed while skiing down the slope, ensuring good speed on the ramp, and maintaining good body posture and form in the air all contribute to a ski jumper's success.