Chapter 07, Problem 017 A helicopter lifts a 81 kg astronaut 19 m vertically from the...
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
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 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 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
help with part 5 1. A 125-kg load is lifted 12.0 m vertically with an acceleration a -0.32g by a single cable. Determine: (a) the tension in the cable, (b) the net work done on the load, (c) the work done by the cable on the load, (d) the work done by gravity on the load, and (e) the final speed of the load assuming it started from rest. 2. A 1.60-m tall person lifts a 2.10-kg book from the...
Chapter 07, Problem 023 56.0°, causing the box to move up a frictionless ramp at constant speed. How much work is done In the figure, a constant force F. of magnitude 82.0 N is applied to a 7.0 kg shoe box at angle on the box by F, when the box has moved through vertical distance - 0.35 m? Number the tolerance is +/-7% Chapter 07, Problem 024 GO In the figure, a horizontal force F of magnitude 18.Nis applied...
PRINTER VERSION (BACK NEXT Chapter 07, Problem 037 GO The figure gives the acceleration of a 2.0 kg particle as an applied force moves it from rest along an x axis from x o to x 9.0 m. The scale of the figure's vertical axis is set by as - 10.0 m/s. How much work has the force done on the particle when the particle reaches (a) x 4.0 m, (b)x - 7.0 m, and (c) x 9.0 m? What...
Chapter 07, Problem 062 A 190 g block is dropped onto a relaxed vertical spring that has a spring constant of k-5.0 N/cm (see the figure). The block becomes attached to the spring and compresses the spring 17 cm before momentarily stopping. While the spring is being compressed, what work is done on the block by (a) the gravitational force on it and (b) the spring force? (c) What is the speed of the block just before it hits the...
Chapter 07, Problem 057 A 208 kg crate hangs from the end of a rope of length L - 13.2 m. You push horizontally on the crate with a varying force F to move it distance d = 3.86 m to the side (see the figure). (a) What is the magnitude of F when the crate is in this final position? During the crate's displacement, what are (b) the total work done on it, (c) the work done by the...
Chapter 28, Problem 017 An alpha particle (q +2e, m 4.00 u) travels in a circular path of radius 3.57 cm in a uniform magnetic field with B = 1.63 T. Calculate (a) its speed, (b) its period of revolution, (c) its kinetic energy, and (d) the potential difference through which it would have to be accelerated to achieve this energy. (a) Number (b) Number (c) Number (d) Number Units Units Units Units