1. Joe is moving his refrigerator to take to college and he begins by pushing it across the wooden kitchen floor. On a flat surface like the floor, how do you calculate how hard he needs to push? Draw a free body diagram (on paper) to help explain your answer and use the simulation Ramp: Force and Motion to check your ideas. Record the minimum force Joe would have to use to move the refrigerator on the kitchen floor.
2. Later, Joe is ready to load his refrigerator onto the moving truck.
a. Explain how he would calculate how much force to use to lift the refrigerator straight up into a truck.
b. Joe starts thinking about easier ways to get it in the truck and remembers he has some wood that he could use to make a ramp. How could he calculate the minimum force needed to push it up the ramp?
Ramp
angle
Weight (Fg)
Fgravity
Ffriction
Fapplied
Resulting motion (stationary, down ramp or up ramp)
Possible calculations to explain

Work = force × a. work b. energy c. distance d. momentum

1. how much energy is needed to raise the temperature of 40.0 g of argon from 25c to 40c? the specific heat capacity of argon is 0.520 j/(g·k) 2a. 23.0 ml of 0.100 m hcl (standard) are added from a buret to neutralize 50.0 ml of an unknown basic solution. 2b. if the oh- produced in the previous reaction came from ca(oh)2, then what is the molarity of the ca(oh)2? 3.calculate the new freezing-point of a solution when 60.5 grams of cacl2 solute is dissolved in 0.612 kg of water. 4. what is the maximum number of moles of alcl3 that can be produced from 5.0 mol al and 6.0 mol cl2? 5. a sample of oxygen gas has a volume of 150 ml when its pressure is 0.923 atm. if the pressure is increased to 0.987 atm and the temperature remains constant, what will the new volume be? 6. nitrogen gas in a closed container at a temperature of 100.0 oc and 3.0 atm is heated to 300 oc. what is the pressure of the gas at the higher temperature?

The speed of light can be used to measure the