1. [0/2 Points] DETAILS PREVIOUS ANSWERS OSCOLPHYS2016ACC 8.1.P.004. (a) What is the momentum in kg . m/s of a garbage truck that is 1.10 x 10" kg and is moving at 34.0 m/s? (Enter a number.) 340000 X kg . m/s (b) At what speed in m/s would an 8.00 kg trash can have the same momentum as the truck? (Enter a number.) 42.5 1x m/s 2. [2/2 Points] DETAILS PREVIOUS ANSWERS OSCOLPHYS2016ACC 8.2.P.018. A 0.400 kg hammer is moving horizontally at 4.50 m/'s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. (a) Calculate the duration of the impact in seconds. (Enter a number.) 0.00444 (b) What was the average force in newtons exerted downward on the nail? (Enter a number.) 405.4 N 3. [1/1 Points] DETAILS PREVIOUS ANSWERS OSCOLPHYS2016ACC 8.3.P.023. Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are moving toward one another, the first having a mass of 140,000 kg and a velocity of 0.300 m/s, and the second having a mass of 125,000 kg and a velocity of -0.120 m/s. (The minus indicates direction of motion.) What is their final velocity (in m/s)? (Enter a number.) 0.102 v m/'s 4. [2/2 Points] DETAILS PREVIOUS ANSWERS OSCOLPHYS2016ACC 8.5.P.032. During an ice show a 70.0 kg skater leaps into the air and is caught by an initially stationary 60.0 kg skater. (a) What is their final velocity in meters per second assuming negligible friction and that the 70.0 kg skater's original horizontal velocity was 4.00 m/s? (Enter a number.) 2.154 Iv m/s (b) How much kinetic energy is lost in joules? (Enter a number.) 258.4magnitude Vo m/s direction VD positive x (b) What are the magnitude and direction of the athlete's average velocity over the entire 60 s interval? magnitude 1.667 Ju m/s direction positive x Additional Materials Reading 7. [-/3 Points] DETAILS OSCOLPHYS2016ACC 3.4.P.046. M A basketball player is running at 4.90 m/s directly toward the basket when he jumps into the air to dunk the ball. He maintains his horizontal velocity. (For each answer, enter a number.) )What vertical velocity (in m/s) does he need to rise 0.650 meters above the floor? m/s (b) How far (in m) from the basket (measured in the horizontal direction) must he start his jump to reach his maximum height at the same time as he reaches the basket? m 8. [-/4 Points] DETAILS OSCOLPHYS2016 3.4.P.042. M Suppose a soccer player kicks the ball from a distance 44 m toward the goal. Find the initial speed of the ball if it just passes over the goal, 2.4 m above the ground, given the initial direction to be 270 above the horizontal. m/'s Additional Materials Reading 9. [1/1 Points] DETAILS PREVIOUS ANSWERS OSCOLPHYS2016ACC 4.3.WA.009. M An object of mass 0.53 kg is initially at rest. When a force acts on it for 2.9 ms it acquires a speed of 10.6 m/s. Find the magnitude (in N) of the average force acting on the object during the 2.9 ms time interval. (Enter a number.) 1937 PN10. [-/4 Points] DETAILS OSCOLPHYS2016 4.4.WA.022. You hold your physics textbook in your hand. (Assume that no other objects are in contact with the book.) (a) Identify the forces acting on the book. (Select all that apply.) O book on hand hand on book O floor on book earth on book (b) For each force you identified in part (a), indicate the direction. (If a force is not applicable, choose NA.) book on hand hand on book [up floor on book NA earth on book down (c) Identify the forces acting on your hand. (Select all that apply.) book on hand hand on book O floor on hand earth on hand (d) For each force you identified in part (c), indicate the direction. (If a force is not applicable, choose NA.) book on hand -Select-- V hand on book -Select- floor on hand --Select--. V earth on hand down (e) Identify the forces that form the action-reaction pair as defined by Newton's third law. earth on hand --Select--. hand on book -Select-.. Additional Materials Reading Viewing Saved Work Revert to Last Response Submit Answer 11. [-/4 Points] DETAILS OSCOLPHYS2016 5.1.WA.004. M Mary applies a force of 70 N to push a box with an acceleration of 0.55 m/s?. When she increases the pushing force to 78 N, the box's acceleration changes to 0.85 m/s?. There is a constant friction force present between the floor and the box. (a) What is the mass of the box in kilograms? kg (b) What is the coefficient of kinetic friction between the floor and the box? Additional Materials12. [-/4 Points] DETAILS OSCOLPHYS2016 6.2.WA.023. M A rotating space station is said to create "artificial gravity"-a loosely-defined term used for an acceleration that would be crudely similar to gravity. The outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally 210 m in diameter, what angular velocity would produce an "artificial gravity" of 9.80 m/s at the rim? rpm Additional Materials Reading 13. [-/4 Points] DETAILS OSCOLPHYS2016 7.2.WA.016. M A man does 4,695 J of work in the process of pushing his 2.70 x 10 kg truck from rest to a speed of v, over a distance of 25.0 m. Neglecting friction between truck and road, determine the following. (a) the speed v (in m/s) m/s b) the horizontal force exerted on the truck (in N) N Physical Constants Additional Materials Reading 14. [-/1 Points] DETAILS OSCOLPHYS2016ACC 7.6.WA.065. M As shown in the figure below, a 2.25 kg block is released from rest on a ramp of height h. 15.0 cm When the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 15.0 cm that has a coefficient of kinetic friction u, = 0.770. Find h (in m) such that the block's speed after crossing the rough patch is 3.60 m/s. (Enter a number.) Im