could someone help with this question
a hockey puck hits the boards at a velocity of 12m/s at an angle of 30 deg in the boards, it is deflected with a velocity of 10m/s at an angle of 25 deg to the boards. determine the pucks change in velocity

Question

could someone help with this question
a hockey puck hits the boards at a velocity of 12m/s at an angle of 30 deg in the boards,  it is deflected with a velocity of 10m/s at an angle of 25 deg to the boards. determine the pucks change in velocity

anonymous · Answer

is anyone able to start me off

anonymous · Answer

the above goes with the following question
an airplane flies with a headin of [N58degW] a distance of 618km.  then it flies 361km deading [E35degS].  determine the planes displacement of trip

anonymous · Answer

this is what I got so far
dax = 618(cos58)= 327
day = 618(sin58)= 524

dbx = 361(cos35)= 296
dby=361(sin35)207= 207

Rx = dax + dbx = 623
Ry = day + dby = 731

R^2 = (Rx)^2 + (Ry)^2
        = 922496
R= 960

is this right so far