Thursday

October 23, 2014

October 23, 2014

Posted by **Joe** on Monday, August 6, 2012 at 8:35pm.

air. This puck bumps nearly head-on into a second puck that has 3 times the mass, moving in the

opposite direction but with the same speed, v i , as the lighter puck. Immediately after the

collision, the first puck is moving at a right angle to its original direction. What is the final speed

of this puck? What is the final velocity of the heavier puck? (That means speed and direction…)

Answers will contain m and v i and some angle θ.

- Physics -
**Elena**, Tuesday, August 7, 2012 at 4:59amDraw the figure (origin is at the origin of the coordinate system):

Vector p1=m1•v1=m•v is directed to the right along +x-axis,

vector p2=m2•v2=3•m•v is directed to the left in –x –direction

Vector sum of the vectors p1 and p2 is directed to the left and =|2•p1|=|2•m•v|;

Vector p'1=m1•u1=m•u1 is directed downwards along –y-axis,

vector p'2=m2•u2=3m•u2 is directed upwards to the left and makes an angle θ with negative direction of x-axis.

Vector sum of the vectors p'1 and p'2 is equal to the vector sum of vectors p1 and p2 according to the law of conservation of linear momentum. Due to this law x- and y- projections of the vectors of momentums are

x: p1- p2 = 0 - p'2•cos θ,

y: 0 = - p'1 + p'2•sin θ.

m•v-3•m•v =3•m•u2•cos θ,

0= - m•u1+3•m•u2•sin θ.

-2• v =3• u2•cos θ,

0= - u1+3• u2•sin θ.

u2=2•v/3cosθ,

u1 =3•u2• sin θ =3•2•v•sin θ/3•cos θ =2•v•tan θ.

**Answer this Question**

**Related Questions**

Physics - The drawing shows a collision between two pucks on an air-hockey table...

physics - find the frictional force between an air hockey puck and the table, ...

physics - An air puck of mass m1 = 0.45 kg is tied to a string and allowed to ...

physics - A collision occurs between two pucks on an air-hockey table. Puck A ...

Physics - A hockey puck of mass 0.16 kg, sliding on a nearly frictionless ...

physics - The drawing shows a collision between two pucks on an air-hockey table...

Physics - An elastic collision occurs between two pucks on an air-hockey table. ...

Physics - Two pucks collide on an air hockey table. Puck A has a mass of 16 g ...

physics - a hockey puck is sliding across frictionless ice at 6m/s. a)what is ...

Physics - Two identical pucks are on an air table. Puck A has an initial ...