when a ball is bounced on the floor why doesn't it reach its original height?

Answer 1

It's a combination of what some of the other people here said:

1. The collission isn't perfectly elastic, meaning that all of the energy from the collision isn't put back into redirecting the balls motion. Some of the energy is transferred into heat, some into sound, all of which is wasted.

2. Gravity. Acceleration due to gravity is not a factor here. For the trip down to the ground gravity is speeding up the ball, for the trip back up it is slowing the ball down, so the total effect of gravity on the ball is nothing.

3. Friction. Friction between the ball and air will also slow down the ball. This value of friction also called "Drag" depends on the density of the air, the volume of the object, and the makeup of the air.

Answer 2

When the ball is going down, we imagine that all the molecules are going the same way. However, this is not the case. Inside the ball, molecules are going every which way, bouncing off each other and vibrating in place. However, on average, they are going down. When the ball hits the ground, some of those molecules bounce straight back up, but some of them bounce off in other directions. We call the energy of all the molecules going the same way kinetic energy. We call the energy of molecules going every which way thermal or heat energy. We say that the kinetic energy of the ball became thermal energy.

Answer 3

I can think of two reasons, and there might be more. The first is that the ball imparts some of its kinetic energy to the surface it bounces against, and the second is that, in your example, the ball is thrown downward, and thus must bounce upward against the force of gravity.

Answer 4

Gravity--- equal & opposite reaction.... part of energy used to force ball back into the air, not enough left to meet the original height of the drop.

Answer 5

Internal friction of the prticles of the ball and the surface it strikes convert some of the energy to heat, thus not returning it to the reaction. Also, air friction on the incidence and return expend some of the energy.

Simple answer, friction.

Answer 6

The collision is not perfectly elastic. Some energy is lost when the ball is compressedand rebounds back. The lost energy causes heat to be generated.

Answer 7

Physical Laws (Conservation of Energy):

(Initial Energy) = (Energy lost due to friction-down) + (Energy lost due to friction - up) + (Energy lost due to friction - impact) + (Energy lost due to sound) + (Energy used to rebound) + (Energy lost due to heat)

The only way to have the ball bounce as high as it started is to reduce the non-rebound terms on the right side fo the equation to zero ... i.e. no friction, no heat generated on impact (or due to friction), and no noise.

Answer 8

there is loss energy due to friction with ear, inelastic collision, and sound energy
Those factors decrease the potential energy initially owned by the ball.

Answer 9

sturdy one take a famous individual what's the top of technologies? a individual interior the mattress with a fever and a conveyor belt close to his nostril wiping all his urghy mucus what's the top of honesty? . . . . . .a pregnant lady travelling in a bus and taking one and a nil.5 cost ticket................. what's the top of insanity. . . . . . dreading to instruct maths in sleep...............

Answer 10

The answer is very very simple. Read your high school science books to reveal the answer! Wow, in todays society, I think they call that studying!