Marty Mcfly is riding a hover board (futuristic skateboard that flys with no rolling resistance) while being towed by a Delorean. Thoughout this problem you may assume the rope is of negligable mass. Marty's mass is my. 1. If the Delorean is traveling at a constant speed ep and there is no air resistance, with what force does Marty need to hold onto the rope? 2. If there is air resitance of magnitude FA pushing back on Marty, with what force does he need to hold the rope. 3. If there is air resitance of magnit ude FA and the Delorean is accelerating forward at acceleration a, with what force does Marty need to hold the rope. 4. Is the magnitude of the force that the Delorean pulls the rope with greater, smaller, or the same as the force Marty holds the rope with? Explain why.

1. A 0.540-kg bucket rests on a scale. Into this bucket you poursand at the constant rate of 56.0 g/s. If the sand lands in thebucket with a speed of 3.20 m/s, (a) what is the reading of thescale when there is 0.750 kg of sand in the bucket? (b) What isthe weight of the bucket and the 0.750 kg of sand?Explain and labled.

Two blocksmịand m2 connected by a rope are being pulled by a horizontalforce F equal 160 N. Suppose that mį=10 kg,20 kg, and the coefficient of kineticm 2 =20 kg10 kgfriction between each block and the surfacem1is 0.52.A. Draw free-body diagrams of both objects.B. Find the acceleration of the systemC. Find the tension in the ropeD. What is the distance that the system ( two masses) will travel if youknow that are started from rest and final velocity is 4.5 m/sec(B) a= { F

An airborne body of mass, m=64.3kg, is pushed straight upward by a vertical force, Fv=641N. a.What is the net force in the vertical irection? Let up be the positive direction, use Fv and let Fg be the wieght of the body.b. what is the magnitude of the net force exerted on the object in newtons?c. what is the acceleration of the body in m/s2?