Question

2. Box o' toys. time interval Fchild on b (newtons) 0 to 2 sec. 120 2 sec. to 4 100 sec. 4 sec. to 6 90 sec. Starting at t 0, a child pushes horizontally on a box, making it slide across the floor. Friction exerted by the floor on the box opposes its motion with a force of 100 newtons, and the box has a total mass of 10 kg. The child pushes with a force that changes, as this table shows. Graph the box's position, velocity, and acceleration vs. time. (Suggestion: Think about this problem and write down some notes first. After that, write up a solution.)

Answer 1

For to to ta 2 secs, Net force "frichis 20N accelerahion mask final velouly at ta 2, v at- 2x2m 2 4mk total desplacument Sgats 4m for to 2to t 4ec Net fora-(tao-1o0) 2oN accelvea hon Nelbey cone total dikacumumt = vt 4x228m 4m's 1 for t1 to t26ACC Netfor f0-loo) 2-10N Yetandahon m final vel dotaluplae ment 4- lx2- 2m/s . 4x 2-x1x2 acmby T vel(m distmve 4 6