A hockey puck with mass 0.255 kg traveling along the blue line ( which is a blue

Question

A hockey puck with mass 0.255 kg traveling along the blue line ( which is a blue-colored line on the ie in a hockey rink) at 1.13 m/s strikes a stationary puck with the same mass. One puck exits the collision in a direction that is 28.1 degrees away from the blue line at a speed of 0.768 m/s. see the figure below. What is the direction that is 28.11 degrees away from the blue line at a speed of 0.768 m/s. What is the direction and the magnitude of the velocity of the second puck after the collision? Is this an elastic collision?

(Give the direction relative to the positive x-axis)

A)V2

B)

C) is it an elastic collision or not?

Explanation / Answer

applying momentum conservation in y direction

0 = 0.255 x 0.768sin28.1 - 0.255 x v2sin

v2sin = 0.3617 ------------------- (1)

and in x direction

0.255 x 1.13 + 0 = 0.255x 0.768cos28.1 + 0.255 x v2cos

v2cos = 0.452 ------------------------ (2)

on dividing,

tan = 0.3617/0.452

= 38.63 degree

and,

v2 = 0.3617/sin38.63

v2 = 0.579 m/s

calculating coeffient of resititution

e = (v2 - v1)/(u2 - u1)

e = (0.579cos38.63 - 0.768cos28.1 )/(1.13 - 0)

e = 0.199

no it is not elastic collision

it is inelastic

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.