A 5.0 kg dog sits on the floor of an elevator that is accelerating downward at 1.20 m/s2.a. What is the magnitude of the normal force of the elevator floor on the dog?A. 34 N            B. 43 N          C. 49 N            D. 55 N            E. 74 Nb. What is the magnitude of the force of the dog on the elevator floor?A. 4.2 N          B. 49 N            C. 55 N           D. 43 N             E. 74 N

A 80 kg person stands on a weight scale in a elevator. The elevator is moving up with a acceleration of 6 meter per second square. The normal force on the person is: a. 1264 N b. 784 N c. 1184 N d. 80 kg e. 480 N

2. If the net force acted upon an object is equal to zero, then its acceleration is equal to ________. a. mass x acceleration b. 9.8 m/s^2 z c. ero m/s^2 d. 100 m/s^2   3. The book is at the top of the wooden table, what are the forces exerted on the bool a. Friction and weight b. Normal force and weight c. Normal force and tension d. No force(s) exerted on the book   4. Which of the following state of motion will the body have zero acceleration?  a. free fall b. accelerated motion c. both at rest and in uniform motion d. uniformly accelerated motion   no need solution. answers only.

1. A 60.0 kg skydiver is falling through the air (parachute opened). At one point, the acceleration of the skydiver is 4.60 m/s². a. Calculate the force of air friction at that moment. b. What will the force of friction be when the skydiver reaches terminal velocity?