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A ball (mass 0.40 kg) is initially moving to the left at 30 m/s. After hitting the wall, the ball is moving to the right at 20 m/s. What is the impulse of the net force on the ball during its collision with the wall? A. 20 kg • m/s to the right B. 20 kg • m/s to the left C. 4.0 kg • m/s to the right D. 4.0 kg • m/s to the left

The nurse is assisting a weak client to ambulate down the hall for the first time. Which of the following nursing actions is correct?

A block is released from rest on a frictionless incline as shown. When the moving block is in contact with the spring and compressing it, what is happening to the gravitational potential energy Ugrav and the elastic potential energy Uel? A. Ugrav and Uel are both increasing. B. Ugrav and Uel are both decreasing. C. Ugrav is increasing; Uel is decreasing. D. Ugrav is decreasing; Uel is increasing.

A lightweight crate (A) and a heavy crate (B) are side-by-side on a frictionless horizontal surface. You are applying a horizontal force F to crate A. Which of the following forces should be included in a free-body diagram for crate B? A. the weight of crate B B. the force of crate B on crate A C. the force F that you exert D. the acceleration of crate B

The two ramps shown are both frictionless. The heights y1 and y2 are the same for each ramp. A block of mass m is released from rest at the left-hand end of each ramp. Which block arrives at the right-hand end with the greater speed? A. The block on the curved track arrives with greater speed. B. The block on the straight track arrives with greater speed. C. Both blocks arrive at the right-hand end with the same speed. D. The answer depends on the shape of the curved track.

The nurse is caring for a hospitalized client with wrist restraints.  The client asks the nurse, “Why are these necessary?”  Which of the following statements would be the nurse’s best response?

A toboggan of weight w (including the passengers) slides down a hill of angleat a constant speed. Which statement about the normal force on the toboggan (magnitude n) is correct? A. n = w B. n > w C. n < w D. Two of the choices, depending on the speed.

A nurse is administering an intramuscular injection of a viscous (thick) medication using the appropriate-gauge needle.  What does the nurse need to know about needle gauges? 

This is a multiple response item. Which of the following are contributing factors to back pain and back injuries in the healthcare setting? Select the three responses that apply.  Type the letter to your answer in alphabetical order using no spaces, commas or periods. A. Lifting clients when fatigued B. Standing for short periods of time C. Uncoordinated lifting D. Repositioning uncooperative clients E. Transferring clients with the proper assistive devices

FREE RESPONSE #3.  You must show all steps and cite any theorems used to support your answer Determine whether the series