A and B are arguing about uniform acceleration. A states that acceleration means " the longer you go ". B states that acceleration means " further you go ". who is right ?
A
B
both
none
Figure 1.33 shows the displacement-time graphs (a) and (b) for a body moving a straight path drawn on the same scales. Then
slope of line in (a) is greater than the slope of line in (b)
slope of line in (b) is greater than the slop of line in (a)
slope of line in (a) is equal to the slope of line in (b)
nothing can be said about the slopes
A body changes its velocity from 5 ms-1 to 35ms-1 in a time 10 S.The acceleration of the body is
5ms-2
3ms-2
30ms-2
25ms-2
Area enclosed by velocity time graph gives
Distance
Displacement
Speed
Acceleration
The SI unit for the resultant velocity is
m/s
km/s
cm/s
mm/s
The moon is m from the earth. A radar signal transmitted from the earth will reach the moon in about
5.2 s
1.3 s
2.6 s
0.70 s
A body goes from A to B with a velocity of 20 m/s and comes back from B to A with a velocity of 30 m/s. The average velocity of the body during the whole journey is
zero
24 m/s
25m/s
none of these
Which of the following distance-time graph (fig.1.45) represents the acceleration motion of a body ?
The distance travelled by a freely falling body is proportional to
the mass of the body
the square of the acceleration due to gravity
the square of the time of fall
the time of fall
In the equation of motion, x = at + bt2 , the units of a and b respectively are
m/s2 , m/s
m/s, m/s2
m/s, m/s
