A helicopter lifts a load vertically with a = 1.50 m/s^2. If the cable is made of steel, d=7.00 mm, and the load is 1000 kg, what is the stress and the strain in the cable?
A helicopter lifts a load vertically with a = 1.50 m/s^2. If the cable is made...
A helicopter lifts a 76 kg astronaut 14 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/14. How much work is done on the astronaut by (a) the force from the helicopter and (b) the gravitational force on her? Just before she reaches the helicopter, what are her (c) kinetic energy and (d) speed?
A helicopter lifts a 67 kg astronaut 20 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/12. How much work is done on the astronaut by (a) the force from the helicopter and (b) the gravitational force on her? Just before she reaches the helicopter, what are her (c) kinetic energy and (d) speed? (a) Number Units (b) Number Units (c) Number Units (d) Number Units SHOW HINT
Chapter 07, Problem 017 A helicopter lifts a 81 kg astronaut 19 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/11. How much work is done on the astronaut by (a) the force from the helicopter and (b) the gravitational force on her? Just before she reaches the helicopter, what are her (c) kinetic energy and (d) speed? (a) Number (b) Number | (c) Number (d) Number Units Units Units Units
A helicopter lifts a 66.5 kg astronaut 13.7 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/10. How much work is done on the astronaut by the force from the helicopter? 9.82x103 3 You are correct. Previous Tries Your receipt no. is 162-8512 How much work is done on the astronaut by the gravitational force on her? 8928.29 J Submit Answer You have entered that answer before Incorrect. Tries 3/10 Previous Tries...
A cable car weighs 2500 kg. The cable is made of steel of diameter 12 mm (Young's modulus of steel is 207 GPa). a) What is the strain in the cable? b) What is the extension in the cable when the cable length is 2.4 m? c) If the yield stress of the steel cable is 300 MPa, how many people can get in the lift car? Assume average weight of one person = 65 kg and Factor of Safety...
A 19600 kg helicopter lifts a 5600 kg truck with an upward acceleration of 1.1 m/s2. Calculate (a) the net upward force on the helicopter blades from the air and (b) the tension in the cable between the helicopter and truck. (a) Number Units (b) Number Units
A crane lifts a block of mass 260 kg vertically at an acceleration of 8.5 m/s^2 through a height of 1.6 m. What is the net force on the block?
9. A crane lifts a 2,000 lb load vertically 30 ft with a 1" cable weighing 1.68 lb/ft. (a) How much work is done lifting the cable alone? (b) How much work is done lifting the load alone? (c) Could one conclude that the work done lifting the ca- ble is negligible compared to the work done lifting the load?
9. A crane lifts a 2,000 lb load vertically 30 ft with a 1" cable weighing 1.68 lb/ft. (a) How...
A small mailbag is released from a helicopter that is descending steadily at 1.50 m/s. (a) After 3.00 s, what is the speed of the mailbag? v = m/s (b) How far is it below the helicopter? d = m (c) What are your answers to parts (a) and (b) if the helicopter is rising steadily at 1.50 m/s? v = m/s d = m
5. (10pts) the 4-mm-diameter cable BC is made of a steel with E = 200 GPa as shown in Fig. 2. Knowing that the maximum stress in the cable must not exceed 190MPa and that the elongation of the cable must not exceed 6 mm, find the maximum load P that can be applied. -BQ 2.5 m P 3.5 m 14.0m Fig. 2