PHYS 1401 Module One Test 1 State how many significant figures are proper in the results of the following calculations 106 7 90 46 210 1 01 Answer 1 2 State how many significant figures are proper in the results of the following calculations 5 9 2 Answer 2 3 State how many significant figures are proper in the results of the following calculations 7 80 x 10 19 3712 Answer 3 4 Tectonic plates are large segments of the earth s crust that move slowly Suppose one such plate has an average speed of 5 50 cm per year What distance m does it move in 60 0 seconds at this speed Put your answer in scientific notation in the following way 2 07e 12 no units Answer 1 05 e 7 5 Tectonic plates are large segments of the earth s crust that move slowly Suppose one such plate has an average speed of 5 50 cm per year You also should know the distance it traveled in 60 0 s previous question What is its speed in miles per million years Answer 34 2 6 Assume that an MX missile goes from rest to a suborbital velocity of 6 50 km s in 40 0 s What is its average acceleration in m s 2 Answer 163 m s2 7 Assume that an MX missile goes from rest to a suborbital velocity of 6 50 km s in 40 0 s What is its average acceleration in m s 2 What is its average acceleration in multiples of g Answer 16 6 m s2 8 Find the magnitude of the velocity va in figure 3 57 in your chapter three powerpoint slide where theta 21 50 and vtot 5 76 m s Answer 2 96 9 Find the magnitude of velocity vb in figure 3 57 where theta 21 5 and vtot 5 76 m s Answer 3 38 10 In an attempt to escape his island Gilligan builds a fact and sets to sea The wind shifts a great deal during the day and he is blown along the following straight lines 2 50 km 450 north of west then 4 70 km 600 south of east then 5 10 km straight east then 7 20 km 55o south of west and finally 2 80 km 100 north of east What is his final position relative to the island Answer 8 8 11 In an attempt to escape his island Gilligan builds a fact and sets to sea The wind shifts a great deal during the day and he is blown along the following straight lines 2 50 km 450 north of west then 4 70 km 600 south of east then 5 10 km straight east then 7 20 km 55o south of west and finally 2 80 km 100 north of east What is angle of the final result Answer 60 8 12 Which of the following is a scientific statement A B C D The moon is made of green cheese There are things we will need to know about Matter is filled with undetectable particles There are parts of the universe that will never be found by man Answer A Because this is testable 13 What is the acceleration of a car that maintains a constant velocity of 100 km h for 10 seconds A B C D 0 10 km h s 10 m s s 1000 km h s Answer A 14 The gain in speed each second for a freely falling object is about A B C D E 0 5 m s 10 m s 20 m s Depends on the initial speed Answer C 15 Roll a bowling ball off the edge of a table As it falls its horizontal component of motion A Decreases B Remains constant C Increases Answer B 16 A bullet is dropped from the top of the Willis Tower in Chicago while another bullet is fired downward from the same location Neglecting air resistance acceleration is greatest for the A A fired bullet B A dropped bullet C is 9 8 m s s for each Answer C