Can someone please help me with my Physics?

falling at otion that she will have after a. Describe what happens to her velocity as she ball across a field. It opens the parachute. stop. You ask your b. Describe the sky diver's velocity from when her what happened to the parachute has been open for a time until she is our foot was transferred about to land. ve. When that force uld Newton agree 49. Three objects are dropped simultaneously from the explain how Newton's top of a tall building: a shot put, an air-filled bal- loon, and a basketball. ree a) mundiliup 53. -speed bicycle. Why a. Rank the objects in the order in which they will the pedals to start reach terminal velocity, from first to last. p it moving at a con- b. Rank the objects according to the order in which they will reach the ground, from first to last. C. What is the relationship between your answers to parts a and b? 1.0-kg ball moving 54 Mastering Problems (614 mph) wes nearly fast depends on g. Joyce pushes 50. What is your weight in newtons? Show your work. a force of 5.0 N. n? 51. A rescue helicopter lifts two people using a winch of 3.0 m/s2 when and a rescue ring as shown in Figure 21. e magnitude of a. The winch is capable of exerting a 2000-N force. n? What is the maximum mass it can lift? sgiving, Kevin b. If the winch applies a force of 1200 N, what is the e to make a rescuer's and victim's acceleration? Draw a free- 0.17 N larger body diagram for the people being lifted. e opposite c. Using the acceleration from part b, how long does ss of 13 g, what it take to pull the people up to the helicopter? Assume the people are initially at rest. rce ect is zero. acting on veryday situa- bbles a ball52_ What force would a scale in an elevator on Earth exert on a 53-kg person standing on it during the following situations? a. The elevator moves up at a constant speed b. It slows at 2.0 m/s2 while moving upward. c. It speeds up at 2.0 m/s2 while moving downward. d. The elevator moves down at a constant speed. e. It slows to a stop while moving downward with a constant acceleration of 2.5 m/sz. 53. Astronomy On the surface of Mercury, the gravita- tional field is 0.38 times its value on Earth. a. What would a 6.0-kg mass weigh on Mercury? b. If the gravitational field on the surface of Pluto is 0.08 times that of Mercury, what would a 7.0-kg mass weigh on Pluto? 54. A 65-kg diver jumps off of a 10.0-m tower. Assume that air resistance is negligible. a. Find the diver's velocity when the diver hit I). The diver comes to a Stop 2.0 m below the sur- face. Find the net force exerted by the water. Masterlng Concept s the water. __ |-A -' I'- 59. Banking Ta: ent situatio of the norr the floor, g Figure Masterh 60. A 6.0 rests a. W e: b. \\l 61. Rai fal Figure 23 Mastering Problems 60. A 6.0-kg block rests on top of a 7.0-kg block, which T. rests on a horizontal table. a. What is the force (magnitude and direction) exerted by the 7.0-kg block on the 6.0-kg block? b. What is the force (magnitude and direction) exerted by the 6.0-kg block on the 7.0-kg block? 61. Rain A 2.45-mg raindrop falls to the ground. As it is falling, what magnitude of force does it exert on Earth? 62. Male lions and human sprinters can both accelerate it at about 10.0 m/s2. If a typical lion weighs 170 kg and a typical sprinter weighs 75 kg, what is the dif- ference in the force exerted by the ground during a race between these two species? (Both the forward and normal forces should be calculated.) 63. A 4500-kg helicopter accelerates upward at 2.0 m/s2. What lift force is exerted by the air on the propellers? 64. Three blocks are stacked on top of one another. The top block has a mass of 4.6 kg, the middle one has a mass of 1.2 kg, and the bottom one has a mass of 3.7 kg. Identify and calculate any normal forces between the objects. Applying Concepts Whiplash If