If u is the initial velocity of an object and v is the velocity after time t,then acceleration of the object is given by
a=(u-v)t
a=u-v/t
a=v-u/t
a=(v-u)t
The SI unit for angular velocity is
m/s
rad
rad/s
m/rad
Area enclosed by velocity time graph gives
Distance
Displacement
Speed
Acceleration
In a vacuum chamber if a coin and a feather are dropped from the same height at the same time,which of them reaches the bottom surface first?
coin
Feather
Both of them reach the bottom at the same time
Cannot be predicated.
The second's hand of a watch is 2 cm long. The speed of the tip of this hand is
0.2 cm/s
2.1 cm/s
21.0 cm/s
none of these
The unit for the rate of change of velocity will be
m/s2
Ns
N/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
The speed-time graph of a moving body in a fixed direction is a straight line.The body
is at rest
moves with varying speed
moves with a constant velocity
Moves with a non zero acceleration.
Area under a velocity-time graph gives
the time taken by a moving object
the displacement of a moving object.
the acceleration of moving object
the retardation of a moving object
The acceleration of a body projected upwards with a certain velocity is
9.8 m/s2
-9.8 m/s2
zero
insufficient data
