نموذج اختبار دوري لمادة الفيزياء

fat0om · #1 06-11-2009, 10:41 AM

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نموذج اختبار دوري أول
(1) نموذج اختبار دوري أول
1. 1 mi is equivalent to 1609 m so 55 mi/h is:
a) 15 m/s b) 25 m/s c) 66 m/s d)88 m/s

2. The SI base unit for mass is:
a) gram b) pound c) kilogram d) kilopound

3. A nanosecond is:
a) 109 s b) 10–9 s c) 10–10 s d) 1010 s

4. Complete the following statement: Displacement is
a) a scalar that indicates the distance between two points.
b) a vector indicating the distance and direction from one point to another.
c) a measure of volume.
d) the same as the distance traveled between two points.

5. The coordinate of a particle in meters is given by x(t) = 16t – 3 t3, where the time t is in seconds. The particle is momentarily at rest at t =
a)0.75 s b) 1.3 s c)5.3 s d)7.3 s

6. An object moves horizontally with a constant acceleration. At time t = 0 s, the object is at x =0 m. What are the initial velocity and acceleration of the object at
x = −1.5 m at time t = 3 s?
a) v0 = +2 m/s, a = +2 m/s b) v0 = −2 m/s, a = +2 m/s
c) v0 = +2 m/s, a = −2 m/s d) v0 = 1 m/s, a = −1 m/s

7. An object dropped from the window of a tall building hits the ground in 12s. The height of the window above the ground is:
a) 29.4 m b) 58..8 m c) 118 m d) 706 m

8. A delivery truck leaves a warehouse and travels 2.60 km north. The truck makes a right turn
and travels 1.33 km east before making another right turn and then travels 1.45 km south to
arrive at its destination. Express the displacement of the truck from the warehouse using unit
vectors

a) d = 1.33ˆi + 1.45ˆj b) d = 1.33ˆi + 1.15ˆj

c) d =1.15ˆi + 1.33ˆj d) d = 1.33ˆi + 2.60ˆj

9. The value of kˆ⋅(kˆ×iˆ) is
a)zero b)+1 c)-1 d)

10. In the diagram, A has magnitude 12 and B has magnitude 8. The x componentof A+ B is
a)5.5 m b)7. c)12.5 d)14

Answer key:
1- b
2- c
3- b
4- b
5- b
6- d
7- b
8- b
9- a
10-c

(2) نموذج اختبار دوري أول

1. During a short interval of time the speed v in m/s of an automobile is given by v = at2 + bt3,
where the time t is in seconds. The units of a and b are respectively:
A. m · s2; m· s4 B. s3/m; s4/m C. m/s2; m/s3D. m/s3; m/s4
E. m/s4; m/s5
2. The SI base unit for mass is:
A. gram B. pound C. kilogram D. ounce E. kilopound

3. A gram is:
A. 10−6 kg B. 10−3 kg C. 1 kg D. 103 kg E. 106 kg

4. 102 milliseconds is equal to :
A. 102 s B. 103 s C. 10 s D. 1 s E. 10-1 s

5. A car travels 40 kilometers at an average speed of 80km/h and then travels 40 kilometers at
an average speed of 40km/h. The average speed of the car for this 80km trip is:
A. 40km/h B. 45km/h C. 48km/h D. 53km/h E. 80km/h

6. The coordinate of an object is given as a function of time by x = 7t − 3t2, where x is in meters
and t is in seconds. Its average velocity over the interval from t = 0 to t = 4 s is:
A. 5m/s B. −5m/s C. 11m/s D. −11m/s E. −14.5m/s

7. Each of four particles move along an x axis. Their coordinates (in meters) as functions of time
(in seconds) are given by
particle 1: x(t) = 3.5 − 2.7t3
particle 2: x(t) = 3.5 +2.7t3
particle 3: x(t) = 3.5 +2.7t2
particle 4: x(t) = 3.5 − 3.4t − 2.7t2
Which of these particles have constant acceleration?
A. All four B. Only 1 and 2 C. Only 2 and 3
D. Only 3 and 4 E. None of them

8. A partical is moving along a straight line . At t=3s its velocity is 10m/s and at t =8s its velocity is zero .the average acceleration is :
A. -6m/s2 B. -2m/s2 C. -3m/s2 D. -4m/s2 E. -5m/s2
9. A vector has a magnitude of 12. When its tail is at the origin it lies between the positive x
axis and the negative y axis and makes an angle of 30◦ with the x axis. Its y component is:
A. 6/√3 B. −6√3 C. 6 D.−6 E. 12

10. If = (6m)ˆi − (8 m)ˆj then 4 has magnitude:
A. 10m B. 20m C. 30m D. 40m E. 50m

11. If= (2m)ˆi − (3 m)ˆj and = (1m)ˆi − (2 m)ˆj, then − 2=
A. (1 m)ˆj B. (−1m)ˆj C. (4 m)ˆi − (7 m)ˆj D. (4 m)ˆi + (1 m)ˆj
E. (−4m)ˆi + (7 m)ˆj
Answer key:
1- D
2- C
3- B
4- E
5- D
6- B
7- D
8- B
9- D
10-D
11-A

Ms.lolaa · 06-11-2009, 01:16 PM

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