In outer space rock 1, with mass 3 kg and velocity < 3500, -2500, 2000> m/s, struck rock 2, which was at rest. After the collision, rock 1's velocity is <3300, -2000, 2300 > m/s. What is the final momentum of rock 2? F2f=<600,- 1500,- 900 > kg. m/s Before the collision, what was the kinetic energy of rock 1? K₁1 = 3.375e7 Before the collision, what was the kinetic energy of rock 2? K₂i = 0 After the collision, what is the kinetic energy of rock 1? Kif = 3.027e7 Suppose the collision was elastic (that is, no change in kinetic energy and therefore no change in thermal or other internal energy of the rocks). In that case, after the collision, what is the kinetic energy of rock 2? K2f = X J On the other hand, suppose that in the collision some of the kinetic energy is converted into thermal energy of the two rocks, where AEthermal, 1 + AEthermal,2 = 1.39 x 106 J. What is the final kinetic energy of rock 2? K2f = X J In this case (some of the kinetic energy being converted to thermal energy), what was the transfer of energy Q (microscopic work) from the surroundings into the two- rock system during the collision? (Remember that Q represents energy transfer due to a temperature difference between a system and its surroundings.) Q = 0

A bullet with a mass of 500 g and a speed of 10.0 m / s crashes head-on into a stationary positioned bullet weighing 200 g. What are their speeds after the collision, if 20.0% of kinetic energy is lost?

Marble A was released at a certain height of the ramp and hit Marble B on the horizontal end of the ramp. Both Marbles A and B weighs 5 grams. The horizontal distances covered by marbles A and B after the collision are 5 cm and 35 cm, respectively. The elevation from the edge of the ramp to the ground is 15cm. Assuming that energy and momentum are conserved, what is initial potential energy (in erg; erg = dyne.cm) of Marble A? Use g=980cm/s2. Round off your answer to two decimal places.  Answer correctly, thank you.

In the game of pool, all the balls have the same mass (0.17 kg). Look at the figure carefully. The white cue ball hits the black ball which was initially at rest on the table. The image below shows what happens to each ball. The black ball has a speed of 1.5 m/s after the collision. What is the speed of the white cue ball after the collision? 3.0 m/s a) 1.8 m/s b) 2.6 m/s c) 4.3 m/s d) 5.2 m/s e) 1.5 m/s 30.0° 60.0° 1.5 m/s

If the momentum of an object is trippled, its kinetic energy will change by what factor?   I think it changes 9 times? not sure.

A Vulcan spaceship has a mass of 6.50 × 104 kg and a Romulan spaceship is twice as massive. Both have engines that generate the same total force of 9.50 × 106 N. If each spaceship fires its engine for the same amount of time, starting from rest and ignoring any change in mass due to whatever is expelled by the engines, calculate the energy of the Vulcan spaceship if the engines are fired for 102 s.

In the figure below, a 3.1 kg box of running shoes slides on a horizontal frictionless table and collides with a 1.8 kg box of ballet slippers initially at rest on the edge of the table, at height = 0.40 m. The speed of the 3.1 kg box is 5.0 m/s just h before the collision. If the two boxes stick together because of packing tape on their sides, what is their kinetic energy just before they strike the floor? ។ h

A 8.3-kg falcon catches a 2.5-kg dove from behind in midair. What is their velocity in unit of m/s after impact if the falcon’s velocity is initially 42 m/s and the dove’s velocity is 1.8 m/s in the same direction?

in a 4kg mass car moving at a speed of 20 m/s in a horizontal plane without friction, an object of 2kg mass hits and sticks at a speed of 20m/s, as shown in the figure. Find the speed of the car after the impact?

Mike then takes his now 1175 kg car and crashes it at 50 m/s into the back of a 1600 kg Jeep traveling at 10 m/s.  They roll off together going 18 m/s.  How much work was done by the crumple zone of Mike’s car? Just a short simple answer will suffice.