Question

2.) In order to “speed up" the loading of a delivery truck with paper products, a certain trio of office employees develop a loading system cleverly named "Señor Lodenstein," porque es muy rápido. If this system is composed of a sled with paper and a rider, with two people pulling it, according to the diagram below, a. How much force must EACH of the pullers apply to accelerate the sled at 5 m/s^2? b. If they only pull on the sled for a distance of 5 meters, how fast will the sled be going when they release it? C. How far will the sled slide across the floor before it comes to a stop? F f = 200 N m=150 kg F f = 200 N m=150 kg 5m Ax = ?

Answer 1

(a) Using Free body diagram,Force is calculated.

Sol: a) from free body diagram. 2F - = mxa = 2F - 200 - 150x5=750 2F = 750+ 200=950 = F = 950 =1475N 2 150 Now, they pull the sled for 3 metres and then release. So, work done is transferred to kt W = Fret. displacement = 2Fx5m W = 950x5= 4ASO I from work-Energy theoses wat hul = 20 = U2 v = 2x4750 62 - 63.33 = v= 163.33 = 17,96 mis Distance it travelled before stopino's u² u²= zas Here vão (as finally it stope) -u²= zas But distance is scalar so, magnitude zas I u = An= 4² (7.96) 2 2x 5 m/s DU 6.33m Ag Sol 2 za - 63.33 To

b) Using this Force and distance travelled,work done is calculated which is converted to kinetic energy ,using it velocity is calculated.

(c) Using 3rd equation of motion , distance travelled is calculated.