A small block with a mass of 0.0900 kg is attached to a cord passing through a hole In a frictionless, horizontal surface. The block Is originally revolving at a distance of 0.40 m from the hole with a speed of 0.70m/s. The cord is then pulled from below, shortening the radlus of the circle in which the block revolves to 0.10 m. At this new distance, the speed of the block is observed to be 2.80 m/s. What is the tension In the cord In the final situation when the block has speed v-2.80m/s? Option1 Option2 Option3 Option4 Option5 7.1 N 0.11 N 6.5 N 0.12 N 2.11 N

A small block with a mass of 0.0900 kg is attached to a cord passing through a hole In a frictionless, horizontal surface. The block Is originally revolving at a distance of 0.40 m from the hole with a speed of 0.70m/s. The cord is then pulled from below, shortening the radlus of the circle in which the block revolves to 0.10 m. At this new distance, the speed of the block is observed to be 2.80 m/s. What is the tension In the cord In the final situation when the block has speed v-2.80m/s? Option1 Option2 Option3 Option4 Option5 7.1 N 0.11 N 6.5 N 0.12 N 2.11 N

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.78P: The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016,...

See similar textbooks

Similar questions

A heavy truck is running up the track at an incline of 1 in 15 (sine) at a constant speed of 50 km/h. The total working power is 65 kW during this working condition. Calculate the power required to overcome the friction of force or the road resistance if knowing the mass of the truck is 10 tonnes?
The crane shown in the figure is lifting a 382-kg crate upward with an acceleration of 2.24 m/s². The cable from the crate passes over a solid cylindrical pulley at the top of the boom. The pulley has a mass of 218 kg. The cable is then wound onto a hollow cylindrical drum that is mounted on the deck of the crane. The mass of the drum is 192 kg, and its radius (the same as that of the pulley) is 0.235 m. The engine applies a counterclockwise torque to the drum in order to wind up the cable. What is the magnitude of this torque? Ignore the mass of the cable. Number Drum Units Pulley- Boom
Three friends ride a Ferris wheel with a diameter of 76m. Their combined mass with each car of the Ferris wheel is 389kg. When their car is at position A, the steel support applies 503N force at the car at an angle of 40degrees with the horizontal. What is the speed of the cars?
The crane shown in the figure is lifting a 186-kg crate upward with an acceleration of 4.21 m/s². The cable from the crate passes over a solid cylindrical pulley at the top of the boom. The pulley has a mass of 195 kg. The cable is then wound onto a hollow cylindrical drum that is mounted on the deck of the crane. The mass of the drum is 136 kg, and its radius (the same as that of the pulley) is 0.198 m. The engine applies a counterclockwise torque to the drum in order to wind up the cable. What is the magnitude of this torque? Ignore the mass of the cable. Pulley- Drum Boom Number I Units N-m
A small block of mass M equals 2.25 kg is fired with initial speed of loss equals 6 m/s along a horizontal section of a frictionless track as shown in the top portion of this figure. The block that moves along the frictionless semi circle vertical track and radius are equals 0.5m. 1) Determine the force exerted by the track on the block at A 2) The bottom of the track consists of a horizontal section of 15 m with friction. Determine the coefficient of kinetic friction between the block and the bottom portion of the track if the block just makes it to point B before coming to rest.
the weight of the trailer is 2130kg, the weight of the tow truck is 6000kg and the slope of the truck is 2% going on a ramp. The speed of 69km/h when first entering the ramp and 320m along the ramp, then 93km/h is the speed. (i) find the total average force on the wheels of the truck. (ii) calculate the average force between the truck and the trailer.
A cyclist intends to cycle up a 6.0 ⚫ hill whose vertical height is 120 m. The pedals turn in a circle of diameter 34.0 cm. If each complete revolution of the pedals moves the bike 4.90m along its path, calculate the average force that must be exerted on the pedals tangent to their circular path. Neglect work done by friction and other losses. Mass of the person riding and bicylce combined is 80 kg
Problem 4 - Does the car make it? A 3.2-kg toy car, initially moving at 5.0 m/s, at a height of 4.0-m encounters a hill of he
A brake test for an automobile is conducted. During the brake test, the automobile of mass 1800 kg (including driver) is travelling at the speed of 110 km/hr as it passes point A, and the car descends a hill of 1in 2 (Sine). The driver applies brakes so as to bring the car speed at B to 50 km/hr. The total frictional resistance to motion is 235 N. Using Work-Energy Method, Calculate the following required to bring the car to 50 km/hr from 110 km/hr in 210 m (From Point A to Point B) B Determine the Value of Total Energy about Point A TE= Determine the Value of Total Energy about Point B TEb= Determine the Value of Breaking Force needed Fb= N A
The mass of the flat belt is 0.6kg/m and the tension on the tight side of the belt is 1.7kN the coefficient of friction between the belt and the pulley is 0.2 and the angular speed N of the belt is 400rpm.Angle of lap fita and the diameter D of the pulley 150°and 50cm respectively.with the addition of centrifugal tension Design the belt drive by determine velocity belt centrifugal tension tension on the slack side of the belt power transmitted at this speed in kilowatts maximum power delivered
An arborist is cutting down a tree a 28 m high tree bystarting his cut 1.8 m above the ground. The tree has a mass of 3750 kg. The tree trunk can be thought of as a uniformly dense, thin rod. 1. What's the speed of the tree’s center of mass when the trunk is parallel to the ground on its way down. The tree rotates about the point where it is cut., 1.8 m above the ground. 2. What is the total amount of kinetic energy that the tree has at thatpoint of parallelism to the ground? How fast would a 950.0 kg truck have to be traveling to have the same kinetic energy as the tree?
The speed of the engine mechanism shown in Figure 1 is controlled by the Porter governor. All arms of the governor are 20 mm and are hinged at a distance of 4 mm from the axis of rotation. The mass of each ball is 100 g and the mass of the sleeve is 500 g. The governor sleeve begins to rise at 40 rad/s. when the links are at an angle of 5° to the vertical. Assuming the friction force to be constant: 3.1. Draw the port governor mechanism and clearly lable it. (06)3.2. Calculate the minimum speed of rotation (in rad/s) when the inclination of the arms to the vertical is 10°.