box of 18kg is released from rest on a rough inclined plane and slides to the bottom. The plane is inclined at a 330 angle to the horizontal and it is 2.8 m high. The coefficient of kinetic friction between the box and the plane is 0.1. A. How much work is done by the normal

A rock climber wears a 7.5 kg backpack while scaling a cliff. After 30.0 min, the climber is 8.2 m above the starting point. a. How much work does the climber do on the backpack? b. If the climber weighs 645 N, how much work does she do lifting herself and the backpack? Please I need a surely answer and a quicker response

A m=2.90 kg book is pushed by a completely horizontal force Fa=15.0 N a distance d=0.75m up a frictionless incline of angle theta = 25 as in Figure 1. A. Determine the work done on the book by Fa. B. Determine the work done on the book by the gravity. C. Determine the work done on the normal force. D. Determine the net work done on the book. E. If the initial velocity is vi=0 m/s, determine the final velocity of the book.

C 4. A box is being pulled across a rough floor with a force P. What can you say about the work done by pulling force, normal force, friction, and gravitational force? 0, W by normal force > 0, Wby friction 0, Why normal force 0, W by normal force= D. Wby pulling force <0, Why normal force = 0, W by friction <0, W by gravitational force = 0 0, W by friction <0. Wby gravitational force = 0

1. A 50 kg sled is pushed by applying a force F = 400 N, as shown, with = 30°. The surface is rough with 4 =.4. If the sled is being displaced a distance of 60 m, find the work done on the sled by: a. An applied force F. b. The dissipative force. c. The normal force. d. The weight. F. e. The net force.

A force, varying with distance as shown in the graph below, acts on a 5.5 kg object. When is most work done, in the first 4 meters or between 4 and 6 meters? Explain your response. a. 4.0 3.0 2.0 1.0 b. Find the work done by the force in moving the object from 0 m to 6.0 m. Explain your calculation and give units. 2.0 4.0 6.0 8.0 Positien Cr Figure 9-15 Assuming that there is no friction or air resistance what is the total change in the object's energy? Explain your answer. с. kinetic FORCE (N)

There is trampoline which is connected to spring on the bottom. The spring constant is 1000 N/m. You are holding a mass of 27 kg at 5.0 m above the top of the trampoline.a.Calculate the potential energy of the mass with respect to the trampoline top. b. Now you decide to drop the mass to the trampoline, calculate velocity when it hits the trampoline? C If trampoline spring compresses 9 cm down, calculate the spring potential energy?

A set of stadium stairs consist of 90, 20 cm high steps. A 70 kg runner is training bytraversing up and down the steps.a. What is the change of potential energy that occurs with each step? For all 90 steps?b. How much work is required to travel up the steps in 20 sec? In 15 sec?c. What is the power required to run up the steps in 20 sec? In 15 sec?d. What is the total work done over the course of the stadium training session? Why?

Timmy (m=50kg) is at the top of a 7m tall hill. a. What type of energy does he have at the top of the hill? b. What is his potential energy? c. What type of energy does he have at the bottom of the hill? d. What is his speed at the bottom of the hill, after he slides down it? e. The hill has a river at the bottom, that causes two things. First is a vertical drop of 2m, second is a horizontal gap. What distance is the gap if Timmy makes the jump? Here you may also assume that at the bottom of the hill Timmy flies horizontally off.

A hand pushes a 3 kg block along a table from point A to point C as shown in the figure below. The table has been prepared so that the left half of the table (from A to B) is frictionless. The right half (from B to C) has a non-zero coefficient of friction equal to µ. The hand pushes the block the full distance from A to C using a constant force of 5 N. The block starts off at rest at point A and comes to a stop when it reaches point C. The distance from A to B is 0.5 m and the distance from B to C is also 0.5 m. We will consider the block by itself as our system so all forces on the block are external. Initial position of block Final position ofblock P no friction friction A B C -1½ m 1½ m