A vehicle travels with a speed of 80 km per h, with a drag coefficient of 0.25. If the cross-sectional area is 6 square meters, then find out the drag force.
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- Scenario #3: Sepak Takraw, known as kick volleyball, is a traditional sport played in Southeast Asia. Players use their feet, knees, and chest to hit a ball over a net, and they score points if their opponents do not return the ball. The balls are traditionally woven from palm vines, and they have a radius of 8 cm, a cross sectional area of 0.02 m², and mass of 0.18 kg. For this problem, assume the ball is kicked with a speed of 22 m/s. Multiple Choice Questions 5) What is the drag force on the 22 m/s ball? Assume they are at sea level and the drag coefficient is 0.35. a) I N b) 2 N c) 3 N d) 4 N 6) If the ball starts from rest and the player kicks it to a speed of 22 m/s, what is the average force of the kick? Assume their foot is in contact with the ball for 20 ms (2 x 10-2 s). a) 100 N b) 200 N e) 5 N 1) 6 N c) 300 N d) 400 N 500 N e) f) 600 N Short Answer Question Sepak Takraw players are remarkably athletic and can jump to impressive heights in order to kick the ball. Suppose a…tires need to be strong for a reason. Suppose the tread on a tire with a radius of 40cm has a mass of 5kg. If the tire is on a car travelling at 150mph, find the force the tread walls have to exert on the tread in order to keep it in circular motion.Problem-solving questions At the back of the leg, two muscles pull on the Achilles tendon to create an upward force. Estimate the nett force if cach muscle has a diameter of about 5.0 mm and exerts a force in a direction of 25° from the vertical. (Use a force per unit area of muscle of 7x10° N/m²). An 18 kg penguin slides down an iceberg at an angle of 15° to the horizontal. Friction between the penguin's body and the ice surface is negligible. Determine the normal force acting on the penguin and its acceleration down the iceberg. A manufacturer of children's slides does some tests and discovers that the slope of a slippery slide must be at least 25° to the horizontal for the slide to work. The child involved in doing the testing weighs 35 kg. What is the coefficient of static friction between the child and the slide? A car drives onto a section of the road which is covered in ice. The driver attempts to stop by hitting the brakes but the wheels lock and the car skids for another 60 m.…
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