Week 2 Quiz

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Physics

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Feb 20, 2024

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e Find the following for path B in Figure 2-59: (a) The distance traveled. (b) The fee] ‘r i (S el \Ij‘ | ] b 0 2 4 6 81012 displacement.x (m) ) Oa)Sm,Sm,Sm Ob)5m,-5m,-5m Quiz Information @ o) 5m,5m,-5m O d)5m,-5m,5m e RS

Page 1: s (21=]1s Q/JL‘, Il EIEI) 4dd 3 [ 13 14 i3 v v v Quiz Information Question 13 (1 point) ® 2) 0.061 s O b) 006111 O c) 0.61s O 165 Question 14 (1 point) A cheetah can accelerate from rest to a speed of 30.0 m/s in 7.00's. Whatis its v Saved v Saved acceleration in m/s2? (o M

dllen IR JHE = v e Quiz Information Question 12 (1 point) v saved Land west of the San Andreas fault in southern California is moving at an average velocity of about 6 cm/y northwest relative to land east of the fault. Los Angeles is west of the fault and may thus someday be at the same latitude as San Francisco, which is east of the fault. How far in the future will this occur if the displacement to be made is 590 km northwest, assuming the motion remains constant? L O a) 1 x 1083 years O'b) 1x10° years ®© o) 1x107 years O d) 1 x107 years Question 13 (1 point

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fi S (= ] Q| ol (5] Quiz Information O d) 111 m/s and 11.1 g Question 10 (1 point) ' Saved The well-fed ants of an ant colony maintain and adhere to a straight trail along the ground between the nearby picnic table and the hole leading to their underground nest, taken as the positive x-axis. One ant is observed first at position % =9.63 m on the trail. Then it is seen staggering back and forth along the trail, eventually stopping, at position x = 8.05 m exactly 96.7 s later. Find the average velocity along the x-axis of the ant during this time intc in m/s. Be sure to add a leading zero to your answer, if applicable. [ -0.0163 ] A Question 11 (1 point) v Saved i 2 A commuter backs her car out of her garage with an acceleration of 1.40 m/s?. () 2 How long (in seconds) does it take her to reach a speed of 2.00 m/s?

Question 9 (1 point) 1 ' Saved Assume that an intercontinental ballistic missil € goes from rest to a suborbital zpeed of 6.50 km/s in 60.0 s 14 What is its average acceleratior, v v .0/s% and in multiples of g (9.80 m/s2)? O 108 m/s and 10.8 g Quiz Information : ®© b) 108 m/sand 11.1 g O c) 111 m/s and 10.8 g O d) 111 m/sand 11.1 g

Question 8 (1 point) v Ssaved Find the following for path D in Figure 2-59: (a) The distance traveled. (b) The magnitude of the displacement from start. to finish. (c) The displacement from start to finish. . Figure 2-59 T 0 2 4 6 81012 ’ displacement x (m) Oa) 4m4m4m Quiz Information O b) 4m,8m,4m O 8m8m,-4m (® d) 8m, 4m,-4m

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a short time. Yes. This is possible if the sign of the v elocity vector is changing from positive to negative over a short time. () Yes. This is possible if the displacement changes over a short time. Question 7 (1 point) v Saved ( = 1 If a subway train is moving to the left (has a negative velocity) and then comesjto a - stop, what is the direction of its acceleration? Is the acceleration positive or negative? 14 v [ i5 '\ v v @ a) To the right. Positive. Riigliiormation O b) To the right. Negative. O c) To the left. Positive. O d) To the left. Negative. stz e achdk‘P’rO

_ i y Would pe the s 3 a straight line in the same direction, ) Question 6 (2 point) v saved Is it possible to have a velocity "0 yet an acceleration that is non-zero? Why? (Multiple correct answers) Quiz Information i () No. This cannot happen Yes. This is possible if the sign of the velocity vector is changing from negative to positive over a short time. Yes. This is possible if the sign of the velocity vector is changing from positive to negative over a short time. D Yes. This is possible if the displacement changes over a short time.

Question 5 (1 point) v Saveq = <l v 12 5 5 g alsl 13 14 il v v v O b) Average speed. They would be the same if motion included changes in = direction. @ a) Average speed. They would be the same if motion . Was all along a straight line in the same direction. Quiz Information O c) Magnitude of the average velocity. They would be the same if motion included changes in direction. O d) Magnitude of the average velocity. They would be the same if motion was all along a straight line in the same direction.

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Question 3 (1 point) Saved How are instantaneous Vvelocity and instantaneous speed related to one. another? O a) The instantaneous velocity will always be equal to the instantaneous speed. O b) The instantaneous Vvelocity will alwa Ys be greater than the instantaneous speed. O c) The instantaneous velocity is the scalar quantity associated with the instantaneous speed. @ d) The instantaneous velocity is the vector quantity associated with instantaneous speed. Quiz Information d Question 4 (1 point) Saved Displacement can be a negative value. (®) True (O False

a Lis a vector quanti distance traveled is the total lej ity describing the change in position, and ngth travelled O c) Displacement is scalar quantity describing the change in position, and distance traveled is the absolute Vvalue of displacement O d) Displacement and distance traveled describe the same quantity inall & circumstances Question 2 (1 point) Saved 4 5 ey 2 A weather forecast states that the temperature is predicted to be -5°C the following e day. Is this temperature a vector or a scalar quantity? O a) Vector @ b) Scalar

Quiz Information Question 1 (1 point) v Saved Which best describes the relationship between displacement and distance traveled? O a) Displacement is a vector quantity describing the total \ength travelled, and distance traveled is its scalar quantity @ b) Displacement is a vector quantity describing the change in position, and distance traveled is the total length travelled ol O c) Displacement is scalar - tity describing the change in position, and distance traveled is the ._solute value of displacement. O d) Displacement and distance traveled describe the same quantity in all circumstances Question 2 (1 point) Saved A weather forecast states that the temperature is predicted to be -50C the following day. Is this temperature a vector ora scalar quantity?

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