Lab: Kinetic Energy

Calculate the average maximum height for all three trials when the speed of the bottle is 2 m/s, 3 m/s, 4 m/s, 5 m/s, and 6 m/s. Record your calculations in Table B of your Student Guide. When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m. When the speed of the bottle is 3 m/s, the average maximum height of the beanbag is m. When the speed of the bottle is 4 m/s, the average maximum height of the beanbag is m. When the speed of the bottle is 5 m/s, the average maximum height of the beanbag is m. When the speed of the bottle is 6 m/s, the average maximum height of the beanbag is m.

0.10 0.43 0.87 1.25 1.86

You will drop the bottle/water mass so that it hits the lever at different speeds. Since an object in free fall is accelerated by gravity, you need to determine the heights necessary to drop the bottle to achieve the speeds of 2 m/s, 3 m/s, 4 m/s, 5 m/s, and 6 m/s. Use the equation Ht = v squared over 2 g. to calculate the height, where Ht is the height, v is the speed (velocity), and g is the gravitational acceleration of 9.8 m/s2. Record these heights in Table B. To achieve a speed of 2 m/s, the bottle must be dropped at m. To achieve a speed of 3 m/s, the bottle must be dropped at m. To achieve a speed of 4 m/s, the bottle must be dropped at m. To achieve a speed of 5 m/s, the bottle must be dropped at m. To achieve a speed of 6 m/s, the bottle must be dropped at m.

0.20 0.46 0.82 1.28 1.84

Calculate the average maximum height for all three trials when the mass of the bottle is 0.125 kg, 0.250 kg, 0.375 kg, and 0.500 kg. Record your calculations in Table A of your Student Guide. When the mass of the bottle is 0.125 kg, the average maximum height of the beanbag is m. When the mass of the bottle is 0.250 kg, the average maximum height of the beanbag is m. When the mass of the bottle is 0.375 kg, the average maximum height of the beanbag is m. When the mass of the bottle is 0.500 kg, the average maximum height of the beanbag is m.

0.35 0.91 1.26 1.57

In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = one half.mv2, where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide. When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.

0.5 1 2 3 5

Calculate the change in the kinetic energy (KE) of the bottle when the mass is increased. Use the formula KE = one half.mv2, where m is the mass and v is the speed (velocity). Assume that the speed of the soda bottle falling from a height of 0.8 m will be 4 m/s, and use this speed for each calculation. Record your calculations in Table A of your Student Guide. When the mass of the bottle is 0.125 kg, the KE is kg m2/s2. When the mass of the bottle is 0.250 kg, the KE is kg m2/s2. When the mass of the bottle is 0.375 kg, the KE is kg m2/s2. When the mass of the bottle is 0.500 kg, the KE is kg m2/s2.

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