1.which of the following is an example of work? a. tim worked hard to carry a box of books across a room b. a scientist works in the laboratory c. sam and rachel worked hard to push the car but it did not move d. joann did work on a box when she pulled it across the floor 2.joe carries his 5 kg cat 3 m horizontally across the living room. what is the net work done on the cat? a. 0j b. 15j c. 150j d. 180j 3.which of the following is associated with an object in motion? a. potential energy b. nonmechanical energy c. kinetic energy d. elastic potential energy 4.which of the following is associated with an object due to its position? a. potential energy b. positional energy c. total energy d. kinetic energy 5.what is kinetic energy of a 1000 kg truck moving at 32.0 m/s? * a.1.2 x 10⁵ j b.3.21 x 10⁵ j c.5.12 x 10⁵ j d.6.34 x 10⁵ j

Aplane flies a distance d from west to east at a constant speed vp , with respect to the air in a time twe . on the return trip, the plane flies a distance d from east to west at a constant speed vp , with respect to the air in a time tew . on both trips the wind blows from west to east at a constant speed va , with respect to the ground 1) what is tew in terms of vp, va, and d, as needed? tew=dvp tew=dvp+va tew=dva tew=dvpâ’va tew=12dvp tew=12dvp+va tew=12dvpâ’va your submissions: b submitted: saturday, january 26 at 6: 49 pm feedback: feedback will be given once all questions have been attempted and the grade cluster button has been pressed. 2) what is twe in terms of vp, va, and d, as needed? twe=dvp twe=dvp+va twe=dva twe=dvpâ’va twe=12dvp twe=12dvp+va twe=12dvpâ’va your submissions: d submitted: saturday, january 26 at 6: 49 pm feedback: feedback will be given once all questions have been attempted and the grade cluster button has been pressed. 3) assuming d = 2300 miles, vp = 400 miles/hr, and twe = 4 hours, what is va, the speed of the wind with respect to the ground? va = 100 miles/hr va = 575 miles/hr va = 200 miles/hr va = 175 miles/hr va = 975 miles/hr 4) once again, assuming d = 2300 miles, vp = 400 miles/hr, and twe = 4 hours, what is tew, the time it takes the plane to fly a distance d miles from east to west? tew = 5.75 hours tew = 11.5 hours tew = 7.67 hours tew = 8 hours tew = 10.2 hours