Given vector possible for the resultant vector (a) 0 (b) 15 (c) 31 (d) 46 (e) no

Question

Given vector

possible for the resultant vector

(a) 0

(b) 15

(c) 31

(d) 46

(e) none of the above

(7) What is the drag racer s speed when the parachute opens?

(a) 45.1 m/s

(b) 82.7 m/s

(c) 13.7 km/s

(d) 117 m/s

(9) Express 71 miles per hour in units of feet per second. (Conversion factors on equation sheet.)

(a) 71 ft/s

(b) 104 ft/s

(c) 408 ft/s

(d) 5984 ft/s

(11) Which of the following represents a

calculations?

(a) v

(b) v

(c) v

(d) v

(e) none of the above

(12) After leaving the cliff, how much time elapses before the car hits the ground?

(a) 1.4 s

(b) 3.3 s

(c) 5.5 s

(d) 11 s

(e) 1.7 s

A cannon ball is shot out of a cannon at 45 m/s at an angle of 67 degrees above the horizontal. Assume

that the effects of air resistance are negligible.

(13) On the way up, how is the magnitude of the acceleration in the horizontal direction changing?

(a) increasing

(b) decreasing

(c) it is not changing. It is a constant value that is not zero.

(d) none of the above

(14) What is the vertical component of the initial velocity?

(a) 23.3 m/s

(b) 38.5 m/s

(c) 106 m/s

(d) 41.4 m/s

(e) 17.6 m/s

(16) Which of the following physical quantities is a vector?

(a) Distance

(b) Time

(c) Temperature

(d) Displacement

(e) Spee

Explanation / Answer

Q1. (b) 15 between 10 and 20 units. Q7. (e) correct. Q(9)(b) 104.1 ft/s. Q11(e) None. Q12 Incomplete data. Q13 (e) ax = 0. Q14 Needs uo and angle. Q16 (d) Displacement. Pl post only one qn at a tie.

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