1. A vector measurement of the rate and direction of motion or the rate and dire

Question

1. A vector measurement of the rate and direction of motion or the rate and direction of the change in the position of an object a. Velocity b. Speed c. Acceleration d. Displacement 2. Determine the velocity of an aircraft Mach 1 a. 420 m/s b. 340 m/s C. 500 m/s d. 280 ms 3. A stone is dropped from a 50-ft high pole. What is the stone's velocity before hitting the ground? a. 31.3 ft/s b. 40.2 ft/'s c. 56.8 fus d. 22.1 ft's 4. A stone is thrown vertically up from the top of 50-ft high pole. If the initial velocity of the stone is 20 f/s, what is the stone's velocity before hitting the ground? a. 29.8 ft/'s b. 37.2 ft/s ?. 44.9Ns d. 60.2 ft/s 5. A car traveling 96 kph is 315m behind a truck traveling at 75 kph How long will it take the car to reach the truck? c. 41 s d. 54 s a. 15 s b. 27s 6. A car traveling 96 kph is 315m behind a truck traveling at 75 kph How far from the initial position of the car will t reach the truck? a. 400 m b. 767 m c. 1440 m d. 1024 m 7. Calculate the average speed of a complete round trip in which the outgoing 250 km is covered at 95 kph, followed by a 1-hour lunch break and return 250 km is covered at 55 kph a. 61 mis c. 35m/s d. 44 ms 8. Amount of separation between two points a. Distance C. Speed d. Velocity 9, using figure # 1, at t-0, an experimental electric powered car starts from rests at point A and moves toward the right. The tangential component of the car's acceleration is a 1+0.2t m/s?. What is the ca's normal acceleration when it reaches point B? a. 37 m/s c. 27 m/s d. 20 m/s? b. 45 m/s 10. Using figure # 1, at t-o an experimental electric powered car starts from rests at point A and moves toward the right. The tangential component of the car's acceleration is ar 1+0.2t m/s?. What is the car's velocily when it reaches point B? a. 32 m/s b. 43 m/s d. 69 m/s 11. Using figure # 1, at t-o an experimental electric powered car starts from rests at point A and moves toward the right. The tangential2 component of the car's acceleration is at 1+ 0.2t m/s2 What is the car's tangential acceleration when it reaches point B? a. 7.4 mis b. 9.1 mis? c. 4.3 m/s2 d. 5.9 ms? 12. The sum ofall gven vectors a. Resistive Vector b. Reclusive Vector c. Resulting Vector d. Resultant Vector 13. A ball is dropped from an edge of a ciff,if it took 5 seconds to hit the ground, how high is the edge of the clift? 2 a. 112.6 ft b. 333.7ft c. 274.1 ft d. 402.5ft 14. The vector direction 265° is the same as a. b. 5° S of E 5° E ofS d. 85° W of S 15. The resultant vector of Vi 3N, dueN and V2 4N, dueW a. Va 7m/s, NW b. VR 5m/s, 53°W of N d. 5m/s, 53'N of W 16. A physical quantity, which is described completely by its magnitude and direction th up a. Vector b. Scalar c. Velocity d. Force

Explanation / Answer

1. rate of change in position = velocity

Ans(a)

2. mach1 = 340 m/s

Ans(b)

3. vf^2 - vi^2 = 2 a d

v^2 - 0^2 = 2(32.174)(50)

v = 56.8 ft/s Ans(c)

4. v^2 - 20^2 = 2(32.174)(50)

v = 60.2 ft/s

Ans(d)

5. v = 96 - 75 = 21 kph

d = 315 m = 0.315 km

t= d /v = 0.315 / 21 = 0.015 hr = 0.015 x 3600 s

t = 54 s

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