Physics Kinematics

A boy is running towards east with a velocity of 10m/s . he suddenly turn towards north. then at that place acceleration due to gravity.

• increases

• decreases

• remain same

• 0

A 100kg and 10kg objects are dropped from the same height . then the ratio of acceleration of fall of two bodies is

• 1:1

• 100:1

• 1:100

• zero

the dimensional form of "g" is

• [ M^o L² T²]

• [M⁰ L¹ T^-2]

• [M⁰ L¹ T^-1]

for a free falling body , initial velocity is

• non zero

• one

• zero

• infinite

if a body is falling freely the the acceleration due to gravity is taken as

• equal

• positive

• negative

• infinite

a free falling body under gravity will have uniform

• speed

• velocity

• momentum

• acceleration

the direction of acceleration due to gravity is always

• towards the center of earth

• along the tangent of earth

• along the chord of earth

• away from the surface of earth

two stones of different masses are dropped simultaneously from the top of a building . then which is correct among these (neglecting the air resistance)

• larger stone hits the ground eariler

• smaller stone hits the ground eariler

• velocity of stones are independent of the mass

• none

a body falls freely from height "h" after 2 seconds if acceleration due to gravity is reversed the body

• continuously to fall down

• falls down with retardation and goes up

• falls down with uniform velocity

• raises up with acceleration

if a body dropped freely from a height of 20m , then the velocity of the body as reaching to the ground is ( g=10m / s²)

• 100m / s

• 150m / s

• 20m / s

• 50m / s