Estimate the power needed to overcome the aerodynamic drag of a person who runs at a rate of 100 yds (300 ft) in 10 seconds in still air. Express your answer in terms of horsepower. Assume CDA = 9 ft2 for the runner. NOTE: ρAIR = 2.38x10-3 slugs/ft3, 1 horse power = 550 lb∙ft/sec.

Q: 1. The 3200 lb car has its center of mass G. Calculate the acceleration of the car and the ormal…

A: The free body diagram of the car is shown below.

Q: Problem #2 - True or False The mechanical efficiency is defined by power output/power input and…

A: A machine is a mechanical linkage where power is applied at a certain point, and the power takes…

Q: Calculate the allowable axial capacity in kN if Fy = 345 MPa. Write your answer rounded to the…

A: Given, W14 x 53 L = 8.2 m or 8200 mm Fy = 345 MPa

Q: چسا W Jh Water Scale The figure shows a water tank that weighs 920 N when empty, and contains 1.1…

A: WT (weight of tank) = 11711 N

Q: The 200-lb man lies against the cushion for which the coefficient of static friction is = 0.5. The…

A:

Q: (See Fluids in the News article titled "Where the plume goes".) Air flows into the jet engine shown…

A: Speed , V1= 305 ft/s  Speed, V2= V3= 833 ft/s

Q: For a short period of time, the motor turns gear A with a constant angular acceleration of a…

A:

Q: The box slides down the path in (Figure 1) described by the equation y = (0.05z) m, where a is in…

A: A)Determine the y component of the velocity of the box at this instant B)Determine the y component…

Q: The car having a weight of 3200 lb travels up the incline at a constant speed of 60 mph. Determine…

A:

Q: A 1-m³ volume of water is contained in a rigid container. Estimate the change in the volume of the…

A:

Q: A rubber ball with a speed of 5 m/s collides head on elastically with an identical ball at rest.…

A: Initial velocity of  1st rubber ball u1= 5 m/s Initial velocity of 2nd rubber ball u₂ = 0 m/s Masses…

Q: A 4500-lb forklift truck is used to lift a 1700-lb crate. -16 in-- -24 in. 12 in. Determine the…

A:

Unit Conversion

Standard units are also called SI units. SI units are used for measuring a physical quantity satisfying certain conditions. There are two types of units: fundamental units and derived units. Fundamental units are physical quantities that are independent, that is, they do not depend on other quantities like mass, length, or time. There are plenty of quantities in our lives which need to be measured and compared. Measuring is the comparison of a particular physical quantity with its reference value. A unit is a measure of a fixed physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.