The mystery behind the see-saw motion lies in force and genesis of counterforce.
Balanced Teeter totter can be achieved by placing equal masses or length adjustment (betwen pivot and mass) for varying mass.
Explanation:
Teeter totter is a wonderful manifestation of physics principles in crude form.
The working of Teeter totter can be explained as-
The whole set-up (Teeter totter) is balanced on a pivot or fulcrum. When either of its edges/sides is loaded, it moves down under the impact of its mass & gravity (force=m*gravity).
Equal and opposite counterforce acts on the other end of the Teeter totter to balance the effect of the previously applied force. As a result of this, the other side is raised upwards in the air.
As a result of this the net force remains balanced on either side (considering similar masses are on both ends of the Teeter totter)
For a Teeter totter to be balanced there are two conditions-
- When both masses are same- When both sides are loaded with an equal mass, then eventually Teeter totter would come to rest by hanging midway.
- When both masses are different then the occupants need to adjust such way that the heavier mass is near to the pivot while lighter mass is at the edge.
2nd class leaver refers to such leaver in which load lies between effort and fulcrum.In a nut cracker too load is in between effort and fulcrum.Thus, nut cracker is a 2nd class leaver.......
Answer:
Some of the kinetic energy from B has been transferred to A
Explanation:
In elastic collision, kinetic energy is conserved. Since A had 0 kinetic energy before the collision, while B has some kinetic energy. And kinetic energy is defined as
As the speed of B decreases post-collision, and its mass stays the same, kinetic energy of B must have been decreased as well.
A gains speed post collision, and so does its kinetic energy. So according to the law of energy conservation, some kinetic energy from B must have been transferred to A.
Answer:
1. A
sound can't travel through vacuum only