\f7. [12.85 Points] OSCOLFHVSZMEACC 3.4.F.D46. MV NOTES ASK YOUR TEACHER PRACTICE ANOTHER A basketball player is running at 5.40 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.) (a) What vertical velocity (in rn/s) does he need to rise 0.750 meters above the oor? 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 Submil Answet 3. [12.85 Points] OSCOLFHVSZME 3.4,P.042. ASK YOUR TEACHER Suppose a soccer player kicks the ball from a distance 30 m toward the goal. Find the initial speed of the ball if itjust passes over the goal, 2.4 ni above the ground, given the initial direction to be 40 above the horizontal. |:l m t Additional Materials ll Reading SubmiIAnswel 10. [-J2.85Points] l DETAILS l OSCOLPHYSZU164.4.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.) D book on hand D hand on book D floor on book D 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 floor on book earth on book (c) Identify the forces acting on your hand. [Select all that apply.) D book on hand D hand on book D floor on hand D 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 hand on book floor on hand earth on hand (e) Identify the forces that form the action-reaction pair as dened by Newton's third law. earth on hand hand on book Additional Materials L3 Reading 11. [-/2.85 Points] DETAILS OSCOLPHYS2016 5.1.WA.004. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Mary applies a force of 75 N to push a box with an acceleration of 0.53 m/s". When she increases the pushing force to 86 N, the box's acceleration changes to 0.72 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 Materials Reading Submit Answer 12. [-/2.85 Points] DETAILS OSCOLPHYS2016 6.2.WA.023. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 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 than in non-rotating space environments. If the space station is 250 m in diameter, what angular velocity would produce an "artificial gravity" of 9.80 m/s at the rim? rpm Additional Materials Reading13. [-/2.85 Points] DETAILS OSCOLPHYS2016 7.2.WA.016. MY NOTES ASK YOUR TEACHER PRACTICE ANOT A man does 4,405 J of work in the process of pushing his 2.90 x 105 kg truck from rest to a speed of v, over a distance of 28.0 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) Physical Constants Additional Materials Reading Submit Answer 14. [-/2.95 Points] DETAILS OSCOLPHYS2016ACC 7.6.WA.065. MY NOTES ASK YOUR TEACHER PRACTICE ANOT As shown in the figure below, a 2.25 kg block is released from rest on a ramp of height h. rough patch 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 M = 0.610. Find h (in m) such that the block's speed after crossing the rough patch is 4.10 m/s. (Enter a number.) m5. [0.95l2.85 Points] DETAILS PREVIOUS ANSWERS OSCOLPHYSZO16ACC E.1.WA.002. MY NOTES l | ASK YOUR TEACHER PRACTICE ANOTHER Two carts mounted on an aii tiack are moving toward one another. Cart 1 has a speed of 1.1 m/s and a mass of 0.40 kg. Cait 2 has a mass of 0.65 kg (a) If the total momentum of the system is to be zero, what is the initial speed (m m/s) at Cart 2? (Enter s number.) 0003 x Can you express the magnitude of the momentum of each cart in terms of its mass and speed? If the total momentum of the two oaits is to be zero and they are traveling in opposite directions, how does the magnitude of the momentum of Carl 1 Compaie to the magnitude of the momentum of Call 2? m/s (b) Does it foiiow that the kinetic energy of the system IS eiso zero since the momentum of the system is Zero? 0 Yes M V (e) Determine the system's kinetic energy (in J) .n orderlo substantiate youi answer to part (b). (Enter a number.) 0003077 x Can you write an expression for the total kinetic energy of the system (both Carts)?] SubmitAnswer s. [012.35 Paints] PREVIOUS ANSWERS OSCOLFHYSZME 3.4tP.042. ASK YOUR TEACHER Suppose a soccer player kicks the ball from a distance 30 m toward the goal. Find the initial speed of the baII if itjust passes over the goal, 2.4 in above the ground, given the initial direction to be 40\" above the horizontaI. 25,623 X m/s i Additional Materials LJ Reading Suhrn ii An swer 9. [012.85 Points] PREVIOUS ANSWERS DSCOLPHYSZMGACC 4.3.WA.009. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An object of mass 0.77 kg is initiaIIy at rest. When a force acts on it for 2.9 ms it acquires a speed of 12.7 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.) 2559 X Which kinematic equation do you need to use to find the aCCEIeratIDri of the object? N i