An object travels 7.5 m/s toward the West and under the influence of a constant net force of 5.2 kN,4.3 s later,it is travelling 2.5 m/s toward the East.What is its mass?
A) 2200 kg
B) 4500 kg
C) 6000 kg
D) 12000 kg

Question

Quizplus · Accepted Answer

The change in velocity is 10 m/s (from 7.5 m/s West to 2.5 m/s East). Using the formula F = ma, where F is the net force (5200 N), m is the mass, and a is the acceleration (change in velocity/time), we find m = F * t / Δv = 5200 N * 4.3 s / 10 m/s = 2236 kg, which is closest to 2200 kg.

An Object Travels 7