Work sheet Chapter 4
Motion in three dimensional
1- Motion in three dimensional Cartesian coordinate system X- and y –axes to lie in
the horizontal plane and the z-axes to point vertically upward.
2- The three coordinate axes are at 90 to one another.
3-The relative orientation of the three coordinate axes using your right hand .
1-Ideal projectile: -
Any object that is released with some initial velocity and
then moves only under the influence of gravitational acceleration .
2- Ideal projectile motion:With no effects due to air resistance or any other forces beside gravity .
Choose the best answer:1- Fired to achieve a maximum range mains
(a)sin2Ө =1
(b)sin2Ө=0
(c) cos2Ө=1
2-The object is projected horizontally mains
(a)Ө=90
(b)Ө=0
(c) none of them
3-Aprojectile is fired with an angle Ө above the horizontal mains
(a) Ө≠0
(b) Ө=0
(c)none of them
4-A projectile motion in the horizontal moves by
(a)acceleration =0
(b) constant velocity
(c) a and b
5-Ideal projectile motion with effect only force
(a)horizontal force
(b) gravity force
(c) a and b
6- The three coordinate axes are at Ө= ……… to one another
(a)Ө=180
(b)Ө=0
(c)Ө=90
7-The time taken by the object to complete one revolution is
(a)frequency (f)
(b) period (T)
(c) angular velocity(ω)
8-directly proportional to the square of the speed and inversely proportional
to the radius of the circle in which the object is traveling the magnitude of
(a)velocity
(b)centripetal
(c) force
9- The revolution per second is
(a)frequency (f)
(b) period (T)
(c) angular velocity
10-The direction of the acceleration vector is perpendicular to the
(a)direction of the velocity
(b)period
(c) none of them
Best wishes Mis:- Leila omer