A 50.0 kg circus performer jumps from a platform into a safety net below. The net, which has a force constant of 5.0 × 104 N/m, is stretched by 0.40 m. If the unstretched net is positioned 1.00 m above the ground, what is the height of the platform above the ground? (Ignore the effects of air resistance.)

prolly a beacuse the momentuem the car has increases while going down hill

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.

b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.