9. A car travelled 50 km in 0.75 h, then travelled 100 km in 1.2 h. The average speed is
A) 77 km/h B) 333 km/h C) 111 km/h D) 26 km/h
10. A car changed position from x = 25 m to x = 150 m in the time interval from 3 s to 8 s, the
average velocity of the car is
A) 25 m/s B) 11.4 m/s C) 35 m/s D) 16 m/s
13. The position of a particale is given by 3 x(t) = 20t − 5t , where x in meters and t in seconds, its
velocity is zero at t =
A) 1.2 s B) 0.87 s C) 1.4 s D) 0.7 s
14. A particle has a constant acceleration (-1.25×1014 m/s2) enters a region with a speed of 5×106
m/s. How far does the particle take to stop
A) 0.1 m B) -0.1 m C) 1 m D) -1 m
15. An electron has a constant acceleration +3.2 m/s2 at a certain instant, its velocity is +9.6 m/s.
What is the velocity at t =2.5s
A) 17.6 m/s B) 8 m/s C) 27.2 m/s D) 0.8 m/s
16. The velocity of a stone falling from a height of 100 m just before hitting the ground is
A) -1960 m/s B) -980 m/s C) -31.3 m/s D) -44.3 m/s
27. Vectors C
and D
have magnitude of 5 units and 3.6 units, respectively . What is
the angle between the direction of C
and D
if C×D
equals to -6 units
A) 109.50 B) -19.40 C) -18.40 D) 950
28. If A
= 18 unit, B
=12 unit and f =900. If C
= A×B
, then the magnitude of a vector C
is
A) 216 B) 0 C) 187.1 D) 108
هذولي الأسئلة شيبوووني
وبالنسبة للأجوبهـ كلها A ماعدا 16 D
ابغى طريقة حلها ،،
والله يعطييييكم العافيهـ
