Question

At t = 0 and u = 0, an object
begins to be uniformly
accelerated by a force of
40N. The momentum of the
body at t = 4 sec is
O 40 Kg ms1
O 80 Kg ms?
O 120 Kg ms
160 Kg ms?​

Answer 1

Step-by-step explanation:

Given At t = 0 and u = 0, an object begins to be uniformly  accelerated by a force of  40 N. The momentum of the  body at t = 4 sec is

• We need to find the momentum of the body.
• According to the Newton’s law of  motion, Force = rate of change of momentum / time
•                                                                                = ΔP / Δt
•                                                            = P final – P initial / t final – t initial
•                                  40 = P f – 0 / 4 - 0     (momentum = mass x velocity  
•                                                                                           so if vel = 0,
•                                                                                          momentum = 0)                                      
•                                                           40 = P f / 4
•                                                  Or Pf = 40 x 4
•                                                 Or Pf = 160 kg m/s

Reference link will be

https://brainly.in/question/338256