What is the potential energy in J of a bungee jumper standing on a 0.109 km bridge that weighs 85 kg? O9.1 x 104 J O9.09 x 103 J 90889.65 9.09 x 104 J

A crate with mass m = 33.3 kg being pushed up an incline that makes an angle φ = 22.7 degrees with horizontal. The pushing force is horizontal, with magnitude P, and the coefficient of kinetic friction between the crate and the incline is μ = 0.358. Consider the work done on the crate as it moves a distance d = 5.32 m at constant speed. a. What is work done by the pushing force, in joules?  b. What is the work done by friction, in joules?  c. What is the work done by gravity, in joules?  d. What is the net work, in joules?

A 101-kg man is skiing across level ground at a speed of 9.5 m/s when he comes to the small slope 1.8 m higher than ground level shown in the following figure.   a. If the skier coasts up the hill, what is his speed when he reaches the top plateau? Assume friction between the snow and skis is negligible. b. What is his speed when he reaches the upper level if an 80-N frictional force acts on the skis?

A spring that has a spring constant of k = 183.0 N/m is oriented vertically, with one end on the ground. What distance y must the spring compress for an m = 2.43 kg object placed on its upper end to reach equilibrium? y = By how much AUspring does the potential energy stored in the spring increase during the compression? AUspring = J

A particle moving along the x-axis is in a system Part B ▼ with potential energy U = 11/x J, where x is in m. What is the x-component of the force on the particle at x = 5 m? Express your answer to two significant figures and include the appropriate units. HẢ ? Fx = Value Units

A 10 cm long spring is attached to the ceiling. When a 2.0 kg mass is hung from it, the spring stretches to a length of 15 cm. What is the spring constant k? How long is the spring when a 3.8 kg mass is suspended from it?

A brick lies perilously close to the edge of the flat roof of a building. The roof edge is 50 ft above street level, and the brick has 260.0 J of potential energy with respect to street level. Someone edges the brick off the roof, and it begins to fall. What is the brick’s kinetic energy when it is 35 ft above street level? What is the brick’s kinetic energy the instant before it hits the street surface?

The spring in a retractable ballpoint pen is 1.8 cm long, with a 320 N/m spring constant. When the pen is retracted, the spring is compressed by 1.0 mm. When you click the button to extend the pen, you compress the spring by an additional 5.0 mm. How much energy is required to extend the spring?

A system in which only one particle can move has the potential energy shown in (Figure 1). Suppose U₁ = 80 J. Figure U (J) U₁ 0 1 2 T 3 4 5 y (m) 1 of 1 Part A What is the y-component of the force on the particle at y = 0.5 m ? Express your answer with the appropriate units. Fy = Submit Part B Fy = Submit μA Value Request Answer What is the y-component of the force on the particle at y = 4 m? Express your answer with the appropriate units. Provide Feedback μà Value Units Request Answer ? Units ?

A spring has a force constant of 12.0 N/m and a rest length of 0.10 m. 0.375 J of energy are used to stretch the spring. What is the new spring length?