Motion 2: Motion 2: Problem Set 1 Problem Set 1
Jan 02, 2016
Motion 2: Motion 2: Problem Set 1Problem Set 1
DIRECTIONSDIRECTIONS Answer the questions and solve the
problems on a separate sheet of paper. Be sure to show all work on the problems which means show the equation used, the filled in equation and give the final answer with the appropriate unit(s).
EQUATIONS AND EQUATIONS AND CONVERSIONSCONVERSIONS
Conversion Factors: Constants:1 kilogram = 2.2 pounds gearth = 9.8 m/sec2
1000 grams = 1 kilogram1 pound = 16 ounces1 centimeter = 0.39379 inches100 centimeters = 1 meter1000 meters = 1 kilometer1 mile = 5280 feet1 kilometer = 0.62 miles
a = vf - vi F = m∙a p = m∙v w = m∙ g
t
a = v s = d v = d t t t
1. If the shark is circling at a rate of 2.5 m/sec, is the shark accelerating? Explain.
1. The shark is accelerating even though it is traveling at the same speed because the shark is constantly changing direction.
3. How long will it take the lobster to get to the island if it accelerates from 0.4 m/sec to 0.7 m/sec at 0.3 m/sec/sec?
4. Tourists see the lobster and try to catch it. If the lobster has a mass of 0.8 kg and runs at a pace of 0.6 m/sec, what is the lobster’s momentum?
5. Two groups of twins have a tug of war contest. Neither team can make the other team move. Is this a balanced or unbalanced force?
6. How fast does the hamster run if he covers 4.3 m in 8.6 seconds?
6. s = d = 4.3 m = 0.5 m/sec t 8.6 sec
7. This is an angry bear. He thinks you ate his blueberries. If he is 15 meters away from you and walking at 2.3 m/sec, how long will it take him to reach you?
8. What is the giraffe’s final velocity if it starts with a velocity of 2.4 m/sec and accelerates at 0.4 m/sec/sec in 45 seconds?
8. a = vf - vi t
0.4 m/sec/sec = vf – 2.4 m/sec 45 sec vf = 20.4 m/sec
11. a. What is the mass of a bowling ball that moves 8.7 m/sec down the alley with a momentum of 55 kgm/sec?