The ratio of SI units to CGS units of retardation is
10-2
102
10
10-1
A train passes over a 400 m long bridge. If the speed of the train is 30 m/s and the train takes 20 s to cross the bridge, find the length of the train.
400 m
600 m
800 m
200 m
Area enclosed by velocity time graph gives
Distance
Displacement
Speed
Acceleration
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
A rubber ball dropped from a certain height is an example of
uniform acceleration
uniform speed
uniform retardation
non-uniform speed
In Fig.1.34, BC represents a body moving
backward with uniform velocity
forward with uniform velocity
backward with non-uniform velocity
forward with non-uniform velocity
For a uniformly accelerated body if 'u' is the initial velocity and 'v' is velocity after time t,then the displacement of the body after time t is given by
S=ut-1/2at
S=ut1/2at
S=ut-1/2at2
S=ut+1/2at2
In the following speed-time graph, the shaded portion gives
distance travelled
average velocity
average speed
displacement travelled
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 following graph (Fig.1.32) of displacement versus time.
the body is at rest
the body has some initial speed
the body moves with constant speed
the body moves with constant velocity
