nabilah S3T5 thnk you madam .. from this video i more understand about the concept of impuls and relationship between force and time which is inversely proportional
we calculate the total energy . if the total energy is not conserved, it is inelastic collision but if the total energy conserved ,it is elastic collision . am i rght madam ?
Natasya S2T1 To determine the type of collision, we need to calculate the total kinetic energy..if the total kinetic energy is conserved,the collision is an elastic collision but if the total kinetic energy is not conserved,the collision is an inelastic collision.am I right madam?
If the kinetic energy is the same, then the collision is elastic. If the kinetic energy changes, then the collision is inelastic. it depends of whether the objects stick together or not.am i right madam?
Very good but not exact at all.. To determine the type of collision(elastic/inelastic) we should calculate value of total energy before and after collision..if same means that total K.E conserved so it is an elastic collision,vice versa..not actually depends on condition of the objects after collision(stick/separate)
We can said: 1)Perfectly elastic-separate after collision 2)perfectly inelastic-stick and move together after collision
If the question did not state 'PERFECT'..so we do not know the condition of the objects after collision.. CONCLUSION: the type of collision can be determine by calculate the K.E only, not depends on the condition after collision..
very good..i got your ideas..this happens because some of the kinetic energy before collision has converted to other form of energy like heat, sound and light(energy loss) due to collision.-energy cannot destroy but can convert to other form of energy...
CONCLUSION: 1)the total kinetic energy is not same before and after collision means that total kinetic energy is not conserved. TOTAL INITIAL K.E is NOT EQUAL TO TOTAL FINAL K.E 2)the total energy is conserved because this is closed system(no external force) and energy cannot be destroy. TOTAL K.E=FINAL K.E+ E loss
Situation 1: a ball of m1 is trown horizontally and hits wall.after the collision the ball moves with same speed but in opposite direction.Discuss :
1)what happen to the velocity?(change/not).give your reason 2)how is about momentum?(change/not).give your reason 3 )howt calculate the impulse delivered to the ball by the wall?
Natasya S2T1 1)The velocity of the ball will change according to the direction,so the velocity will become negative. 2)The momentum will change because the velocity change. 3)The impulse can be calculated by using the equation [impulse=Ft=m(v-u)].
Sachini S3T5 1.velocity changes as the direction of ball changes 2. Momentum changes as there is change in velocity. 3.Calculate using the impulse equation..
yes,it has because we applied force on it as we kick the ball. thus it causes the change of momentum of an object when the object is acted upon by a force for an interval of time
very good sya..i got your ideas..force exerted on the ball in a contact time will change the velocity of the ball.hence the momentum changes.there is impulse
nabilah S3T5
ReplyDeletethnk you madam .. from this video i more understand about the concept of impuls and relationship between force and time which is inversely proportional
Nabilah,how to determine the type of collision?elastic/inelastic collision?
Deletewe calculate the total energy . if the total energy is not conserved, it is inelastic collision but if the total energy conserved ,it is elastic collision . am i rght madam ?
DeleteGood try..but actually not about the total energy.total energy is conserved for all type of collision since no external force(closed system)
DeleteAnyone..have any answer?revision..
ReplyDeleteNatasya S2T1
DeleteTo determine the type of collision, we need to calculate the total kinetic energy..if the total kinetic energy is conserved,the collision is an elastic collision but if the total kinetic energy is not conserved,the collision is an inelastic collision.am I right madam?
Perfect..very good natasya..you talk about conservation of kinetic energy right?what means by conservation?
DeleteConservation of kinetic energy means that the total kinetic energy initial equal to the total kinetic final.
DeleteNatasya S2T1
DeleteConservation of kinetic energy means that the total kinetic energy initial equal to the total kinetic energy final.
afiq S2T1
ReplyDeletecalculate the total kinetic energy before and after the collision am i right madam????
Yup..correct..so,how to determine the type of collision?explain..
DeleteIf the kinetic energy is the same, then the collision is elastic. If the kinetic energy changes, then the collision is inelastic. it depends of whether the objects stick together or not.am i right madam?
DeleteVery good but not exact at all..
DeleteTo determine the type of collision(elastic/inelastic) we should calculate value of total energy before and after collision..if same means that total K.E conserved so it is an elastic collision,vice versa..not actually depends on condition of the objects after collision(stick/separate)
We can said:
Delete1)Perfectly elastic-separate after collision
2)perfectly inelastic-stick and move together after collision
If the question did not state 'PERFECT'..so we do not know the condition of the objects after collision..
CONCLUSION: the type of collision can be determine by calculate the K.E only, not depends on the condition after collision..
Now the issue is about inelastic collision..we know that total K.E is not conserved..why this happen?give your reason...
Deleteafiq S2T1
Deletethis is because it has converted in the form of energy such as heat
fariza S2T1
Deletebecause some of the energy converted to internal energy such as heat but the total energy is still conserved
very good..i got your ideas..this happens because some of the kinetic energy before collision has converted to other form of energy like heat, sound and light(energy loss) due to collision.-energy cannot destroy but can convert to other form of energy...
DeleteCONCLUSION:
1)the total kinetic energy is not same before and after collision means that total kinetic energy is not conserved.
TOTAL INITIAL K.E is NOT EQUAL TO TOTAL FINAL K.E
2)the total energy is conserved because this is closed system(no external force) and energy cannot be destroy.
TOTAL K.E=FINAL K.E+ E loss
This comment has been removed by the author.
ReplyDeleteSachini S3T5
ReplyDeleteThank you madam..Able to understand and recall this chapter..
Thinesh F3T3
ReplyDeleteThank you madam...can understand this topic very well now madam
Situation 1: a ball of m1 is trown horizontally and hits wall.after the collision the ball moves with same speed but in opposite direction.Discuss :
ReplyDelete1)what happen to the velocity?(change/not).give your reason
2)how is about momentum?(change/not).give your reason
3 )howt calculate the impulse delivered to the ball by the wall?
Let'think.."APPRECIATE THE GOD's GIFT"
Natasya S2T1
Delete1)The velocity of the ball will change according to the direction,so the velocity will become negative.
2)The momentum will change because the velocity change.
3)The impulse can be calculated by using the equation [impulse=Ft=m(v-u)].
Sachini S3T5
Delete1.velocity changes as the direction of ball changes
2. Momentum changes as there is change in velocity.
3.Calculate using the impulse equation..
Congrates!!!perfect👍💯🤩
DeleteThis comment has been removed by the author.
ReplyDeleteIf i kick a ball,is there has impulse?explain breifly..
ReplyDeleteyes,it has because we applied force on it as we kick the ball.
Deletethus it causes the change of momentum of an object when the object is acted upon by a force for an interval of time
*syafiqah S2T1
Deletevery good sya..i got your ideas..force exerted on the ball in a contact time will change the velocity of the ball.hence the momentum changes.there is impulse
DeleteJ=m(v-u)=Fdt