Question

The triangle is right triangle which three sides are a,

Phys 2513-quiz 1 - Feb.9 15, 2017 Name: Student ID: Question 1-3 are problems of chapter 1 worth 5 points each. If it is multiple choices, clearly circle one 1) The speed of flight is now defined to be 2.997 924 58 10'8 m/'s, Express the speed of Light to a) Three significant figures, 3.00 10 b) Five significant figures, 21o® c) Seven significant figures 2.997924 ios 2) The triangle is right triangle which three sides are a,/3a, and 2a, the angle corresponding To 2a is its right angle (90 degree), find the angle corresponding to a, find the angle Corresponding to v3a. 3) A speed of 7 pm/ns is equal to a) 7000 m/s b) 70 m/s c) 7 m/s d) 0.07 m/s Hint: 1 m-1000000 μm, l s= 109 ns 4) (15 points) An airplane is going to lading, its touchdown velocity, vo -725 m's, to-o starts to apply brake and use reverse thrust of engine, by doing these, the airplane obtain the deceleration of a -4.27 m/s. When if fully stops, vy-0, what is the braking distance? long it takes the airplane fully stop?

Answer 1

For Q2, we can use tiogonometry to get the required angles.

For Q3, we can convert to SI units

For Q4, equations of motion can be used to get stopping distance and time.

2. 2.a 3a abona 3 a 7XID m/s 000 m/s 72.S V 72.S a 4.27 | 16-978 s | tin , t, s