Can i get help with these questions please

HW4, Chapter 4&5 5. E SSM A person in a kayak starts paddling, and it accelerates from 0 to 0.60 m/s in a distance of 0.41 m. If the combined mass of the person and the kayak is 73 kg, what is the magnitude of the net force acting on the kayak? 19. H SSM A 325-kg boat is sailing 15.0" north of east at a speed of 2.00 m/s. Thirty seconds later, it is sailing 35.0" north of east at a speed of 4.00 m/s. During this time, three forces act on the boat: a 31.0-N force directed 15.0" north of east (due to an auxiliary engine), a 23.0-N force directed 15.0 south of west (resistance due to the water), and Fw (due to the wind). Find the magnitude and direction of the force Fw- Express the direction as an angle with respect to due east. (Hint: Use the component method: (i) find the acceleration components first from change in velocity vector; (ii) find the components of the forces.) 27. E SSM Synchronous communications satellites are placed in a circular orbit that is 3.59 x 10' m above the surface of the earth. What is the mag- nitude of the acceleration due to gravity at this distance? 49. M SSM A person is trying to judge whether a picture (mass = 1.10 kg) is properly positioned by temporarily pressing it against a wall. The pressing force is perpendicular to the wall. The coefficient of static friction between the picture and the wall is 0.660. What is the minimum amount of pressing force that must be used? (Hint: use the maximum static friction equation.) 53. E SSM Three forces act on a moving object. One force has a magnitude of 80.0 N and is directed due north. Another has a magnitude of 60.0 N and is directed due west. What must be the magnitude and direction of the third force, such that the object continues to move with a constant velocity?81. M V-HINT A 205-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0" with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.900, and the log has an acceleration of magnitude 0.800 m/s'. Find the tension in the rope. Chapter 5 21. M CHALK SSM The hammer throw is a track-and-field event in which a 7.3-kg ball (the "hammer") is whirled around in a circle several times and released. It then moves upward on the familiar curving path of projectile motion and eventually returns to earth some distance away. The world record for this distance is 86.75 m, achieved in 1986 by Yuriy Sedykh. Ignore air resistance and the fact that the ball is released above the ground rather than at ground level. Furthermore, assume that the ball is whirled on a circle that has a radius of 1.8 m and that its velocity at the instant of release is directed 410 above the horizontal. Find the magnitude of the centripetal force acting on the ball just prior to the moment of release. (Hint: Find first the magnitude of the velocity (or speed) at the instant of release, using projectile motion analysis.) 33. E SSM A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.70x 10* m/s, and the radius of the orbit is 5.25 x 10 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has a radius of 8.60 x 105 m. What is the orbital speed of the second satellite