Asteel ball with mass 0.347 kg falls onto a hard floor and bounces. its speed just before hitting the floor is 23.6 m/s and its speed just after bouncing is 12.7 m/s.
(a) what is the magnitude of the impulse of the ball?
(b) if the ball is in contact with the floor for 0.0139s, what is the magnitude of the average force exerted onthe ball by the floor?

(a)The magnitude of impulse of the ball is  12.5951kgm/s

(b)F=906.19N

Explanation:

m=0.347kg , u=23.6m/s, v=12.7m/s

we will take the direction of final velocity as negative.

Impulse(ft)=m(v-u)

=0.347(-12.7-23.6)

Impulse=-12.5951 kgm/s

= 12.5951kgm/s

(b)t=0.0139s

F=m(v-u)/t

F=12.595/0.0139

F=906.19N

the journeys of marquette, joliet and la salle a) new france expand.

all three of these explorers explored the midwest and the area around the great lakes, which they subsequently claimed for france.

this was a big portion of territory and expanded new france which before then only consisted of quebec province in northeastern canada

it is b. absorbs thermal energy