فيزياء: أي استفسار أول سؤال

[طالبه مطحونه]

لو سمحت يا استاذ هذي الاسئله ما عرفت كيف طريقه حلها ممكن شرح جزااك الله خير


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




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:
d = 1.33ˆi + 1.15ˆj
r
d = 1.33ˆi + 2.60ˆj
r
a) 29.4 m b) 58..8 m c) 118 m d) 706 m







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

ما عرفت كيف احط الصوره حقته بس المتجه A مركبته السينيه والصاديه موجبه ويصنع زاويه 45درجه مع محور السينات الموجب

والمتجه B مركبته السينيه موجبه والصاديه سالبه ويصنع زاويه 60 مع محور السينات الموجب



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