A 580 N skydiver in free fall is accelerating at -8.8 m/s^2 rather than -9.81 m/s^2 because of the force of air resistance. How much drag force is acting on the skydiver?
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A 580 N skydiver in free fall is accelerating at -8.8 m/s^2 rather than -9.81 m/s^2 because of the force of air resistance. How much drag force is acting on the skydiver?
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- A black widow spider hangs motionless from a web that extends vertically from the ceiling above. If the spider has a mass of 1.5 g, what is the tension in the web?A single-celled animal called a paramecium propels itself quite rapidly through water using its hair-like cilia. A certain paramecium experiences a drag force of ?drag=−??2 in water, where the drag coefficient ? is approximately 0.290 kg/m . If the paramecium's speed ? is 0.000157 m/s , what is the magnitude of the propulsion force that the creature must generate to move at this constant speed? 1.69 × 10-9 N 3.41 × 10-9 N 7.15 × 10-9 N 9.26 × 10-9 NA single-celled animal called a paramecium propels itself quite rapidly through water using its hair-like cilia. A certain paramecium experiences a drag force of ?drag=−??2 in water, where the drag coefficient ? is approximately 0.330 kg/m . If the paramecium's speed ? is 0.000137 m/s , what is the magnitude of the propulsion force that the creature must generate to move at this constant speed?
- Joe pushes down the length of the handle of a 14.1 kg lawn spreader. The handle makes an angle of 47.1° with the horizontal. Joe wishes to accelerate the spreader from rest to 1.39 m/s in 1.7 s. What force must Joe apply to the handle? Answer in units of N.A car has a mass of 1750 kg. If the driver applies the brakes while on a gravel road, the maximum friction force that the tires can provide without skidding is about 6500 N. If the car is moving at 22 m/s, what is the shortest distance in which the car can stop safely?You are at the grocery store pushing on a shopping cart. The mass of the cart including all the delicious food you will buy is 26.0 kg. The coefficient of friction between the floor and the wheels of the shopping cart is 0.30. In order to accelerate the cart to 2.40 m/s from rest in 2.50 m, what force must you apply to the cart?
- While pushing your 55.0 kg lawnmower across the lawn (μ = 0.100) you notice that the handle makes an angle that is 55.0° below the horizontal. What force must you push the lawnmower with in order to have it accelerate at 2.0 m/s²?You are designing a high-speed elevator for a new skyscraper. The elevator will have a mass limit of 2400 kg (including passengers). For passenger comfort, you choose the maximum ascent speed to be 18.0 m/s, the maximum descent speed to be 10.0 m/s, and the maximum acceleration magnitude to be 5.00 m/s2. Ignore friction. What is the maximum upward force that the supporting cables exert on the elevator car?A box of oranges with a weight of 78 N is being pushed across a horizontal floor. As it moves, it is slowing at a constant rate of 0.90 m/s each second. The push force has a horizontal component of 20 N and a vertical component of 25 N downward. Calculate the coefficient of kinetic friction between the box and floor. μk= ?
- A 1100-kg elevator is rising and its speed is increasing at 3.0 m/s2. The tension in the elevator cable is: Group of answer choices 1100 N 11000 N 7500 N 3300 N 14000 NA 1000-kg elevator is rising and its speed is increasing at 3 m/s². The tension force of the cable on the elevator is: 1000 N 09800 N 6800 N O 12800 N O none of the given choicesA skydiver accelerates downward at 8 m/s2 during the first second. Her weight is –540 N. The net force on the skydiver is –200 N. What is the drag force?