Question

Pls help promise to mark brainlist

Answer 1

Answer:

answer...................

Answer 2

Momentum, product of the mass of a particle and its velocity.Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle.

S.I. unit = $kgms^{-1}$

from O to A = acceleration = 40-0(change of velocity)/time or 2

acceleration = 20m/s^2

F =ma , 5 kg x 20 =100 kgms^-1

acceleration from b to c = v-u/t

= 0 -40/10-6 =-40/4

= -10ms^-2 acceleration

F =ma

f= 5 x -10ms^-2 = -50kgms^-2 or (kgms^-2 =N)