A cleaner pushes a 4.50-kg laundry car in such a way that The net external force on it is 60.0 N. calculate the magnitude of its acceleration.A brave but inadequate rugby player is being pushedBackward by an opposing player who is exerting a force of 800 N on him. The mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20 m/s^2 backward. (a) What is the force of friction between the losing player's feet and the grass? (b) What force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) Draw a sketch of the situation showing the system of interest used to solve each part. For this situation, draw a free-body diagram and write the net force equation.Suppose a 60.0-kg gymnast climbs a rope. (a) What is the tension in the rope if he climbs at a constant speed? (b) What is the tension in the rope if he accelerates upward at a rate of 1.50 m/s^2?

> > (a) Find the magnitudes of the forces F1 and F2 that add _> to give the total force Ftot shown in Figure 4.35. This may be done either graphically or by using trigonometry. (b) Show graphically that the same total force is obtained e a independent of the order of addition of F1 and F2 .(c) Find the direction and magnitude of some other pair of _> vectors that add to give Ftot . Draw these to scale on the same drawing used in part (b) or a similar picture. Flo! = 20 N F2 Free-body diagram F2 0. F1 F1