Alocal elevator moves upward at a constant 2.1 mps passing a stopped express elevator. precisely 2.7 seconds later the express elevator catches up with the local elevator where the velocity of the local with respect to the express elevator is -9.5 m/s. determine (a) the acceleration of the express elevator in m/s/s he distance traveled in m for the

4.3 m/s² ( approx )

Explanation:

Velocity of local elevator with respect to express elevator initially is 2.1 mps

After 2.7 seconds , the gap between them is

2.7 x 2.1 = 5.67 m

The express elevator begins with acceleration . At the time of catching up

velocity of local with respect to express is - 9.5 m /s .That means velocity of

express with respect to local will be 9.5 m/s .

Relative velocity of express is 9.5 m/s

Absolute velocity of express is 9.5 + 2.1 = 11.6 m/s

Acceleration of express = change in velocity / time

= ( 11.6 -0)/ 2.7 = 4.3 m/s² ( approx )

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.

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min