Ascene in a movie has a stuntman falling through a floor onto a bed in the room below. the plan is to have the actor fall on his back, but a researcher has been hired to investigate the safety of this stunt. when the researcher examines the mattress, she sees that it effectively has a spring constant of 65144 n/m65144 n/m for the area likely to be impacted by the stuntman, but it cannot depress more than 11.79 cm11.79 cm without injuring him. to approach this problem, consider a simplified version of the situation. a mass falls through a height of 3.72 m3.72 m before landing on a spring of force constant 65144 n/m.65144 n/m. calculate the maximum mass that can fall on the mattress without exceeding the maximum compression distance.

24.06 kg

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

Maximum mass of the person is 24.06 kg

answer; i believe the correct answer is (40,000 j) good luck

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz