What is an example of kinetic energy at work? Q A ball lodged in a tree. 0 A frisbee flying through the air. O A car in the garage. Question 10 (2 points) I: An object I with a mass of 4 kg is lifted in three different ways until it gets to top of the ramp. 1- Vertically up 2- on the ramp 3- on the steps In which way is the potential energy of the object at its maximum. than . I "Fossil fuels" refers to 0 All of the above. Question 2 (2 points) _II An arrow in a bow has _______________ energy 0 potential Which is an example of chemical energy? O a horse pulling a cart a thermos of hot coffee an animal digesting food O a marching band in a parade Question 4 (2 points) Listen Energy can be measured in O joules ON 'S Om/s Om/sm/s O Newtons NewtonsA snowboarder at the bottom of the hill has 1 200 J of kinetic energy after her first run. After sliding a ways along the flat, she has 350 J of kinetic energy. How much energy was lost due to friction? A snowboarder at the bottom of the hill has 1 200 J of kinetic energy after her first run. After sliding a ways along the flat, she has 350 J of kinetic energy. With the skier sliding on a flat surface, is there any change in gravitational potential energy? O Her potential energy has not changed. 0 Her potential energy has increased. 0 Her potential energy has decreased. Kinetic energy is not possessed by O a bullet moving in a parabolic path at its highest point. O the propeller of a plane during flight. O a pendulum in the middle of its swing. O an elevator standing at the fifth floor. 0 the earth moving around the sun. Question 8 (2 points) _I:I An object that has potential energy has this energy because of its 0 speed. 0 acceleration. O momentum. O location. Which statement is incorrect about friction? 0 when I'm cold, friction helps by rubbing my hands together 0 the lack of friction on icy days makes driving unsafe O | wish I had more friction when trying to open a jar 0 good tires make the friction less when you use the brakes. 0 running on ice certainly makes you appreciate friction Question 6 (2 points) 4)) Listen u The force that works against motion is ____________ . 0 direction 0 motion A 4-slice toaster puts out 27 W of power for every 81 W put into it. The efficiency of the machine is 033% 050% 067% 0133% 2- on the ramp 3- on the steps In which way is the potential energy of the object at its maximum. 0 all the same A snowboarder at the bottom of the hill has 1 200 J of kinetic energy after her first run. After sliding a ways along the flat, she has 350 J of kinetic energy. With a decreased kinetic energy, what do yo know about the snowboarder's velocity? 0 Her velocity has decreased. 0 Her velocity has increased. 0 Her velocity remained the same. Question 14 (2 points) _II A refrigerator puts out 456 W of power for every 502 W put into it. The efficiency of the machine is 091% 078% 09% 0110%