A puck of mass mA that is moving along the +x axis with speed va collides with another puck of mass mB = 2mA. The collision is not head-on, so that after they collide, mB is located at 45◦ south of east, while mA collides head-on elastically with a stationary puck of mass mC = 3mA. If, after the second collision, the final velocity of mC is 0.450 [m/s], 25◦ north of east, what is the initial speed va?

a) A proton (p) of mass 1.43-u(unified atomic mass units) traveling with a speed 4.13 x 104 m/s of has an elastic head-on collision with a helium (He) nucleus (mHe = 4.00 u) initially at rest. What is the velocity of helium nucleus after the collision? (As mentioned in Chapter 1, 1 u = 1.66 x 10–27 kg but we won’t need this fact.) Assume the collision takes place in nearly empty space. b) A proton (p) of mass 2.48-u(unified atomic mass units) traveling with a speed 2.64 x 104 m/s of has an elastic head-on collision with a helium (He) nucleus (mHe = 4.00 u) initially at rest. What is the velocity of helium nucleus after the collision? (As mentioned in Chapter 1, 1 u = 1.66 x 10–27 kg but we won’t need this fact.) Assume the collision takes place in nearly empty space.

Two rocks collide in outer space. Before the collision, one rock had mass 12 kg and velocity ‹ 4300, −3000, 2550 › m/s. The other rock had mass 5 kg and velocity ‹ −500, 1900, 3600 › m/s. A 1 kg chunk of the first rock breaks off and sticks to the second rock. After the collision the 11 kg rock has velocity ‹ 1550, 250, 2000 › m/s. After the collision, what is the velocity of the other rock, whose mass is now 6 kg?

A joelshawon is a subatomic particle with a mass of 3.5 G and it is made out of a joelon (mass 1.5 g) and a shawon (mass 2g). A joelon going 7.9 x 10^6 m/s to the east collides with a shawon going 1.2 x 10^6 m/s to the north determine the speed and direction of the resulting joelshawon