Name: Part 4: CALCULATING WORK AGAINST GRA_ at is den occurs when an object is displaced upward against gravrty. POW performed. Calculate work, mass, height, or power. W=m-g-h =Z Joule52N-m Watrs=% t Sabrina walks up one ight of stairs from the rst oor to the height is 3.4 meters- second oor. The vertical difference in Sabrina's mass is 50 kg. Calculate the work performed against gravity. Report your answer in Joules. . ___________,____; It took Sabrina 20 seconds to walk up the stairs. Calculate the power Sabrina expended to climb the stairs. Use the answer for work in the previous problem. Report your anSWer in Watts. Leroy drives a forklift. The forklift raises a 250 kg crate to a shelf 2.2 meters above the floor. Calculate the work performed against gravity to lift the crate. Report your answer in Joules. __________ It took the forklift 1.6 seconds to lift the crate. Calculate the power exerted by the forklift to lift the crate. Use the ' answer for work in the previous problem. Report your answer in Watts. , A crane lifts four steel beams from the ground to the 10th floor of a building under construction. The total mass of the steel beams is 4000 kg. The crane performs 1,480,000 Joules of work against gravity. Calculate the height to which the steel beams were lifted. Report your answer in meters. The crane exerted a total of 1235 Watts of power lifting the steel beams. Calculate the amount of time it took for the crane to lift the steel beams. Use the work from the previous problem. Report your answer in seconds. An elevator carnage has six passengers. The elevator transported the six passengers to the 6th floor, a height of 21 meters. The total work exerted by the elevator motor to lift the elevator carriage and six passengers was 533,400 Joules. Calculate the combined mass of the elevator carriage + six The elevator motor exerted 66,675 Watts of power to lift the elevator carriage to the 6'h floor. Calculate the time for the elevator to move to the 6'\" floor. Use the answer for work from the previous problem. Report your answer in seconds. Here's \\ passengers. Report your answer in kg