During the annual shuffleboard competition, Renee gives her puck an initial speed of 9.32 m/s. Once leaving her stick, the puck slows down at a rate of -4.06 m/s/s.
a. Determine the time it takes the puck to slow to a stop.
b. Use your initial speed and the calculated time to determine the average speed and the distance which the puck travels before stopping.

Question

During the annual shuffleboard competition, Renee gives her puck an initial speed of 9.32 m/s.  Once leaving her stick, the puck slows down at a rate of -4.06 m/s/s.  
a.  Determine the time it takes the puck to slow to a stop.
b.  Use your initial speed and the calculated time to determine the average speed and the distance which the puck travels before stopping.

anonymous · Answer

a. Use the cinematic equation V = Vo + at. You have Vo (9.32m/s), you have a (-4.06m/s^2) and V = 0 (stop). Solve for t.

b. Try to work it out now. :-) If you still can't, ask again

unklerhaukus · Answer

*kinematic

anonymous · Answer

@UnkleRhaukus Indeed, I didn't intend to talk about movies :-) My bad.

anonymous · Answer

i got the first one a) 2.30 s, but having trouble with part b

anonymous · Answer

a) a=-4.06 m/s^2.
    u=9.32 m/s
    v=0 m/s
    t=?

a=(v-u)/t
or, t=(v-u)/a
thus, t= (9.32/4.06) = 2.3 sec.

b) average speed = (u + v)/2
 thus, avg speed = 4.66 m/s

And, distance traversed before stopping:
using eq: s=((u+v)/2)*t
              s= 10.72m..

anonymous · Answer

ok nice work thanx

anonymous · Answer

welcome...:)