What does bouncing elastically mean?
elastic collision: A collision in which all of the momentum is conserved. For example, a ball that bounces back up to its original height.
Is bouncing a ball an elastic collision?
When a ball is dropped to the ground, one of four things may happen: It may rebound with exactly the same speed as the speed at which it hit the ground. This is an elastic collision.
Is dropping a ball elastic or inelastic?
A ball dropping is an example of an inelastic collision where part of the kinetic energy is changed to some other form when colliding with a surface. Another example of an inelastic collision is a car crash.
Is the momentum of a ball colliding elastically with the floor conserved?
If a perfectly elastic ball collides vertically with the floor, the rebound speed is the same as the incident speed. If the floor remains at rest, then kinetic energy is conserved but momentum is not conserved. To conserve momentum as well as energy, the floor must recoil at finite speed, even if it is extremely heavy.
Do heavier balls bounce higher?
Both balls will fall at a similar speed, but because kinetic energy is proportional to the mass of the object, the heavy ball reaches Earth with more energy. It will not necessarily rebound higher, as it also needs more kinetic energy to reach a specific height again.
Why is it impossible for a ball to be 100% efficient?
No machine is free from the effects of gravity, and even with wonderful lubrication, friction always exists. The energy a machine produces is always less than the energy put into it (energy input). That is why 100% efficiency in machines shall not be possible.
Which ball bounces higher when dropped together?
rubber ball
When all three balls are dropped from the same height, the rubber ball will bounce the highest because it has the greatest elasticity. When the rubber ball hits the ground it gets compressed, or squished, and because it is very elastic, it quickly returns to its original shape.
How momentum is conserved when a ball bounces?
Explain how momentum is conserved when a ball bounces against a floor. It is conserved when there are no outside forced present and it has an equal and opposite traction. Also, the ball’s momentum is transferred to the ground. As a ball falls toward Earth, the momentum of the ball increases.
Is momentum conserved for the ball?
The momentum of the ball is not conserved at all. But if it is an perfectly elastic collision the kinetic energy will be conserved and then from (1/2)m(V^2)i=(1/2)m(V^2)f you have the two velocities equal in magnitude. The momentum of the ball of course changes and the change is equal to two times the initial momentum!
Why dont balls bounce as high on the second bounce?
During a collision, some of the ball’s energy is converted into heat. As no energy is added to the ball, the ball bounces back with less kinetic energy and cannot reach quite the same height.
What happens when two bouncing balls collide?
Two balls will rarely hit exactly dead on. Glancing blows are far more likely. In any case, the impact will happen along the normal of the tangent where the balls collide. You need to calculate the vector component of both along this normal given their initial velocities.
How do I create collision detections for my bouncing balls?
The fastest thing to do is calculate their square bounding boxes and see if those collide. Two of the sides need to cross (top of 1 and bottom or 2, and left of 1 and right of 2, or vice versa) in order for the bounding boxes to overlap. No overlap, no collision. Now, when they do overlap, you need to calculate the distance between them.
What makes a collision between two balls elastic?
To do a perfectly elastic collision between the balls, you only need to worry about the component of the velocity that is in the direction of the collision. The other component (tangent to the collision) will stay the same for both balls.
How do you calculate collision between two balls?
The other component (tangent to the collision) will stay the same for both balls. You can get the collision components by creating a unit vector pointing in the direction from one ball to the other, then taking the dot product with the velocity vectors of the balls. You can then plug these components into a 1D perfectly elastic collision equation.
