Lab 4 -EdwardsA (1)

GENERAL PHYSICAL SCIENCE ANSWER SHEET – POWER & MOMENTUM (1/2 point each unless otherwise marked) Group Members: Alyx, Bethany, and Tyyee Date: 2-6-2024 Procedure #1: Power (4 points for the table) Data Table Name Trial Weight in lb (F) Vertical height of steps in ft (d) Time required to scale the flight of steps in seconds (t) Work done W = Fd Units: (ft ∙ lb) Power P = W/t Units: (ft ∙ lb)/s Horsepower developed P ÷ 550 Units: (hp) Alyx Edwar ds Walking 120 lb 9.2 ft 5.64 s 1,104 J 195.7 J/s 0.35 hp Alyx Edwar ds Running 120 lb 9.2 ft 3.11 s 1,104 J 354.9 J/s 0.64 hp Betha ny Walking 165 lb 3 ft 3.5 s 495 ft lb 141 ft lb/s 0.26 hp Betha ny Running 165 lb 3 ft 1.5 s 495 ft lb 330 ft lb/s 0.6 hp Tyyee Walking 150 lb 7.25 ft 8.12 s 1087.5 133.93 .24 hp Tyyee Running 150 lb 7.25 ft 4.57 s 1087.5 237.96 .43 hp _ Walking _ _ _ _ _ _ _ Running _ _ _ _ _ _ Results (1 point each) 1. Explain why there is a difference in the horsepower developed in walking and running up the flight of stairs. Because you use more energy while running up the stairs. 2. Is there some limit to the height of the flight of stairs used and the horsepower developed? Yes, as you increase your speed you can burn more energy, but that can cause you to decrease in speed. 1 | Page

GENERAL PHYSICAL SCIENCE ANSWER SHEET – POWER & MOMENTUM 3. Could the horsepower developed by a slower-moving student ever be greater than the horsepower developed by a faster-moving student? Yes, they can lose their power at a faster rate because they are burning more energy, while the slower-moving student is saving energy. Procedure #2: Momentum (1 point per column) Velocity (Use the graphs to estimate the maximum velocity to the nearest 0.1) Release Position 40 cm 60 cm 80 cm Estimated Velocity in m/s Trial #1 1.4 m/s 1.7 m/s 1.9 m/s Trial #2 1.6 m/s 1.8 m/s 1.8 m/s Trial #3 1.6 m/s 1.7 m/s 1.9 m/s PROCESSING THE DATA 1. Release Position 40 cm 60 cm 80 cm Show your work for calculating the average velocity 1.4 + 1.6 + 1.6= 4.6/3 =1.5 m/s 1.7 + 1.8 + 1.7= 5.2/3 = 1.7 m/s 1.9 + 1.8 + 1.9= 5.6/3= 1.9 m/s Average velocity in m/s 1.5 m/s 1.7 m/s 1.9 m/s 2. Release Position 40 cm 60 cm 80 cm Show your work for calculating the car’s momentum 180.4 x 1.5 180.4 x 1.7 180.4 x 1.9 Momentum in g•m/s 270.6 m/s 306.7 m/s 342.8 m/s 3. 2 | Page