newtons 3 rd law states the forces will be equal and opposite then why the ball is going in the same direction the bat hit it ? when it has to go the reverse direction.
2006-12-10 03:48:26 · 11 answers · asked by smart g 1 in Science & Mathematics ➔ Physics
The ball is traveling toward the bat at a certain speed. When the bat and the ball hit there is a reaction and the ball switches direction and goes the other way.
Peace!
2006-12-10 03:50:10 · answer #1 · answered by carole 7 · 0⤊ 1⤋
There are two things.
1. There are two forces. One is from the bat and the another one is from the ball. If the magnitude of the these two forces are equal and they are exactly colliding in 180 degree( face to face) then the bat and the ball should not move there after. but thereafter because of the force applied by the batsman the bat's direction may change.
2. secondly if the magnitude of the force is not equal and the direction of collision also not 180 degree then resultant force direction will be the end.
Newtons law holds good for the first case in your question.
Great thinking ya for you.
2006-12-10 04:04:40 · answer #2 · answered by h s 1 · 0⤊ 0⤋
The forces *are* equal and opposite for the period of time that the bat is in contact with the ball. And, during this time, there is a huge amount of force exerted against the ball (it's called 'impulse') which slows it down and then reverses its direction (a = F/m and v = v0-at). Since momentum is *always* conserved (mv = MV) the vastly more massive bat has far more momentum than the ball and, after the collision, the malls momentum has to be in the same direction as the bat. BUt, since it isn't a perfectly elastic collision, there is some energy lost in heating of the ball and bat, and in acoustic energy (the 'cracking' sound as the ball is hit).
Hope that helps âº
Doug
2006-12-10 04:01:29 · answer #3 · answered by doug_donaghue 7 · 0⤊ 0⤋
What it think you are having a problem understanding is , why doesn't the bat go the other direction. The bat will go in the opposite direction if their wasn't a continuing force on the bat. Try it , swing the bat and at the last instant let it go, the bat will go the opposite direction just like the ball. It it the continuing force on the bat (you still swing it) that coses it to continue forward.
2006-12-10 04:03:12 · answer #4 · answered by James S 2 · 0⤊ 0⤋
The forces are the same on both the bat and the ball. The ball hits the bat and the bat hits the ball with equal forces.
It is the differences in Momentum that you need to observe to see how the ball will move after being hit by the bat. The bat has more mass than the ball, and the bat is being swung with a large velocity. Momentum = mass X velocity
2006-12-10 03:52:06 · answer #5 · answered by physandchemteach 7 · 0⤊ 0⤋
no, the opposite reaction is the bat slowing down slightly and getting hot, and the sound is also caused by the same thing. That's the momentum, and the heat and sound is energy lost, like a "slight error" is all calculations.
The reason for direction changes is conservation of momentum. For the equations to work, you have to realize that the ball is being hit really by the bat's weight and the weight of the hitter. So I used a ratio of 80 to one:
so if the mass of the bat and person is 80 in respect to the ball 1, and the velocity of the bat is 40, the ball is 60
momentum of one moving thing: MV
Rule: sum of momentum before a collision = sum after collision
FYI if the batter is hitting left to right, speed is positive, the ball is first moving right to left, so it's velocity is "negative." When we find x, the final speed of the ball, it should be positive, because it changes direction.
Initial = Final
MV(batter) + MV(ball)=
its 80(40) + (1)(-60) = 80(38) + 1(x)
3200-60 = 3040 + x
3140 = 3040 + x
x = 100mph, etc.
so the ball goes from -60 mph (towards the batter) to 100 mph int the right direction
2006-12-10 03:50:31 · answer #6 · answered by Underlined name. 4 · 0⤊ 0⤋
The bat is bigger than the ball. forces are equal in this case, but mass and energy are not. IF two balls hit, they would go in opposite directions. The energy of the ball is subtracted from the energy of the bat, but the bat still has positive energy which is higher than what the ball had to start with, so the bat keeps going, only slower.
2006-12-10 03:51:44 · answer #7 · answered by auntiegrav 6 · 0⤊ 0⤋
I believe you are getting mixed up.
Newtons 1st Law :- Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by force to change that state
3rd Law :- To remain in equilibrium to every action there is an equal and opposite reaction
But the ball changes direction so the 3rd law does not apply.
But if you call on his 2nd Law :- Rate of change of momentum is proportional to the impressed force and takes place in the direction of the straight line in which the force acts. Yeahhhh!
2006-12-10 04:03:13 · answer #8 · answered by Anonymous · 0⤊ 0⤋
ball is traveling TO the bat....it is moving in the OPPOSITE direction to the bat, the bat swings and hits it, in turn changing its direction to that of the bat.
an object will remain in motion till an equal or greater force changes its direction.
2006-12-10 03:51:46 · answer #9 · answered by Anonymous · 0⤊ 0⤋
but when the ball meets direct opposition, or an even greater force driving it in the other way, such as the bat, the two forces will sorta "square off" and the greater force or mass, which should be the bat, will win and the ball will be forced in the other direction...
2006-12-10 03:52:20 · answer #10 · answered by Anonymous · 0⤊ 0⤋