Calculate Ki, the initial kinetic energy of the system of two balls just before the collision, and Kf, the total kinetic energy of the two balls just after the collision. Give your results in joules.
Gravitational force
In nature, every object is attracted by every other object. This phenomenon is called gravity. The force associated with gravity is called gravitational force. The gravitational force is the weakest force that exists in nature. The gravitational force is always attractive.
Acceleration Due to Gravity
In fundamental physics, gravity or gravitational force is the universal attractive force acting between all the matters that exist or exhibit. It is the weakest known force. Therefore no internal changes in an object occurs due to this force. On the other hand, it has control over the trajectories of bodies in the solar system and in the universe due to its vast scope and universal action. The free fall of objects on Earth and the motions of celestial bodies, according to Newton, are both determined by the same force. It was Newton who put forward that the moon is held by a strong attractive force exerted by the Earth which makes it revolve in a straight line. He was sure that this force is similar to the downward force which Earth exerts on all the objects on it.
Elastic Collisions
Here is the values I have already solved for:
- mass of each ball= 8.4g
- vertical distance from the bottom of the ramp to the floor= 0.79 m
- distance O0 and the center of the circle I0= 0.49 m
- time t that the ball is in the air, from when it leaves the track until it strikes the floor= 0.402 s
- v1i of the incoming ball just before the collision= 1.22 m/s
- distance between O0 and I, the center of the circle where the incoming ball landed after the collision= 0.313 m
- v1f, the speed of ball 1 just after the collision= 0.779 m/s
- distance between the point OT and T, the center of the circle where the target ball landed after the collision= 0.36 m
- v2f, the speed of ball 2 just after the collision= 0.896 m/s
- Use coordinates where the x-axis is along the line that connects O0 and I0. With a protractor, measure the angle ?1 between this x-axis and the line that connects O0 and I= 43 degrees
- Measure the angle ?2 between the x-axis and the line that connects OT and T= 36.5 degrees
a) Calculate Ki, the initial kinetic energy of the system of two balls just before the collision, and Kf, the total kinetic energy of the two balls just after the collision. Give your results in joules.
b) Calculate pix, the x-component of the momentum of the two balls just before the collision, and pfx, the x-component of the momentum of the two balls just after the collision.
c) Calculate |pf1y| and |pf2y|, the y-components of momentum of each ball after the collision.
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