The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. The acceleration in m/s2 after starting from rest is
a. 0 d. 8
b. 2 e. 16
c. 4
[Ques. 2] If a material cannot transfer charge along its length, the material is:
a. a metal.
b. a conductor.
c. an insulator.
d. self-contained.
e. a magnet.
[Ques. 3] The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. The velocity acquired after starting from rest in m/s is
a. 0 d. 8
b. 2 e. 16
c. 4
[Ques. 4] A hologram like the one shown here cannot be fully appreciated from pictures shown in a book. Why is this?
a. The colors are brighter in a hologram.
b. Textbook printing methods cannot reproduce any picture generated by laser light.
c. A hologram appears as a three-dimensional image to the viewer, but not by viewing the flat page of a book.
d. Information from each point in the scene is recorded in all points of the hologram.
[Ques. 5] The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. The distance from the starting point in meters is
a. 0 d. 8
b. 2 e. 16
c. 4
[Ques. 6] Which kinds of waves can be polarized?
a. longitudinal waves
b. dispersed waves
c. refracted waves
d. sound waves in air
e. transverse waves
[Ques. 7] A ball is dropped from a rooftop of a building and falls for two seconds. The acceleration of gravity is 9.8 m/s2 . The ball is referred to at the two second time. The acceleration of the ball in m/s2 is
a. 0 d. 6
b. 4.9 e. none of these
c. 9.8
[Ques. 8] What is the wavelength m of light in a material?
a. m = n
b. m = /n
c. m = + n
d. m = 3
e. m = n/
[Ques. 9] A ball is dropped from a rooftop of a building and falls for two seconds. The acceleration of gravity is 9.8 m/s2 . The ball is referred to at the two second time. The velocity of the ball in m/s is
a. 0 d. 6
b. 4.9 e. none of these
c. 9.8
[Ques. 10] Why does the very thin region at the top of a soap bubble sometimes appear black?
a. Because no light passes through it.
b. Because inverted light waves and non-inverted light waves reflecting from the two surfaces cancel each other.
c. Because it is too thin to reflect light.
d. Because both reflected waves are inverted or else neither is inverted.
e. Because the rest of the film creates a shadow that obscures the colors we would otherwise see.