Question

the resultant of Two vectors is perpendicular to one of them and has the magnitude 4m if the sum of the magnitude of two vectors is 8m then their respective magnitude are
1) 4m, 4m
2) 2m,6m
3)3m,4m
4)1m,7m​

Answer 1

Answer:

Momentum

Newton’s first law was for scenarios where net force = 0. The second law is for scenarios with net force not equal to 0. Momentum plays a crucial role in Second law.

Momentum is the product of mass of a body & its velocity

It is a Vector quantity

It is denoted by p = mv

For example, A ball of 1 kg moving with 10m/sec has a momentum 10kg m/sec.

Momentum of a system remains conserved. Therefore,

Greater force is required to set heavier bodies in motion

Greater force is required to stop bodies moving with higher velocities

Conclusion: Greater the change in momentum in a given time, greater is the force that needs to be applied. In other words, greater the change in momentum vector, greater is the force applied.