Which of the following is the equation of a uniformly accelerated motion?
V2=ut+2as
V2=u2+2as
V2=u2+a2t2
V2=u2-a2t2
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
The SI unit for angular velocity is
m/s
rad
rad/s
m/rad
The acceleration of a body projected upwards with a certain velocity is
9.8 m/s2
-9.8 m/s2
zero
insufficient data
The slope of the velocity-time graph gives
distance travelled
Displacement
Speed
Acceleration
The physical quantity corresponding to the rate of change of displacement is
speed
velocity
acceleration
retardation
Which of the following physical quantity is different from others ?
distance
energy
average velocity
A car starts from rest and travels a distance 800m in 20s with uniform acceleration.Acceleration of the car after 20 s is
4ms-2
8ms-2
6ms-2
5ms-2
A stone tied to a string is whirled in a circle. As it is revolving, the rope suddenly breaks. Then
the stone files off tangentially
the stone moves radially inward
the stone moves radially outward
the motion of the stone depends upon its velocity
A particle experiences constant acceleration for 20 s after starting from rest. If it travels a distance X1 , in the first 10 s and distance X2 , in the remaining 10 s, then which of the following is true ?
X1 = 2X2
X1 = X2
X1 = 3X2
none of these
