Questions from College Physics

Q: The ratio of the tensile (or compressive) strength to the

The ratio of the tensile (or compressive) strength to the density of a material is a measure of how strong the material is “pound for pound.” (a) Compare tendon (tensile strength 80.0 MPa, density 11...

Q: A horizontal rope is attached from a truck to a 1400 kg

A horizontal rope is attached from a truck to a 1400 kg car. As the truck tows the car on a horizontal straight road, the rope will break if the tension is greater than 2500 N. Ignoring friction, what...

Q: Use Bernoulli’s equation to estimate the upward force on an airplane’s wing

Use Bernoulli’s equation to estimate the upward force on an airplane’s wing if the average flow speed of air is 190 m/s above the wing and 160 m/s below the wing. The density of the air is 1.3 kg/m3,...

Q: In Problem 15, if the slope is not frictionless so that

In Problem 15, if the slope is not frictionless so that the skier has a final velocity of 10.0 m/s, calculate the work done by gravity, the work done by the normal force, the work done by friction, an...

Q: Use this method to find how the speed with which animals of

Use this method to find how the speed with which animals of similar shape can run up a hill depends on the size of the animal. Let L represent some characteristic length, such as the height or diamete...

Q: A spotter plane sees a school of tuna swimming at a steady

A spotter plane sees a school of tuna swimming at a steady 5.00 km/h northwest. The pilot informs a fishing trawler, which is just then 100.0 km due south of the fish. The trawler sails along a straig...

Q: Let's examine the crossover network of Fig. 21.20 in

Let's examine the crossover network of Fig. 21.20 in the limiting cases of very low and very high frequencies. (a) How do the reactances of the capacitor and inductor compare for very low frequencies...

Q: To pass a physical fitness test, Massimo must run 1000 m

To pass a physical fitness test, Massimo must run 1000 m at an average rate of 4.0 m/s. He runs the first 900 m in 250 s. Is it possible for Massimo to pass the test? If so, how fast must he run the l...

Q: Find the tension in the Achilles tendon and the force that the

Find the tension in the Achilles tendon and the force that the tibia exerts on the ankle joint when a person who weighs 750 N supports himself on the ball of one foot. The normal force N = 750 N pushe...

Q: An elevator can carry a maximum load of 1202 kg (including

An elevator can carry a maximum load of 1202 kg (including the mass of the elevator car). The elevator has an 801 kg counterweight that always moves with the same speed but in the opposite direction t...