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 unit for the rate of change of velocity will be
m/s
m/s2
Ns
N/s
When the distance an object travels is directly proportional to the length of time, it is said to travel with
constant speed
constant acceleration
zero velocity
uniform velocity
N kg-1 is NOT the unit of
retardation
rate of change of velocity
acceleration
all the above
The ratio of SI units to CGS units of retardation is
10-2
102
10
10-1
In the equation of motion, S = ut +1/2 at2 , S stands for
distance in t seconds
distance in the tth second
maximum height reached
none of these
A body strikes the floor vertically with a velocity u and rebounds at the same speed. The change in velocity would be
u
3u
2u
zero
A ball is thrown up with a certain velocity. It attains a height of 40 m and comes back to the thrower. Then the
total distance covered by it is 40 m
total displacement covered by it is 80 m
total displacement is zero
total distance covered by it is zero
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 velocity of a particle increases from u to v in a time t during which it covers a distance S. If the particle has a uniform acceleration, which one of the following equation does not apply to the motion ?
S=(u+v)t2 /2