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1.
Two cars 
are travelling in the same direction with velocities 
When the car 
is at a distance 
behind the car 
the driver of the car applies the brake producing uniform retardation, 
There will be no collision when
are travelling in the same direction with velocities When the car is at a distance behind the car the driver of the car applies the brake producing uniform retardation, There will be no collision when
2.
A body of 
10 
is moving with a constant velocity of 
.When a constant force acts for 4 
on it, it moves with a velocity 2 
in the opposite direction. The acceleration produced in it is
10 is moving with a constant velocity of .When a constant force acts for 4 on it, it moves with a velocity 2 in the opposite direction. The acceleration produced in it is
3.
A body, thrown upwards with some velocity reaches the maximum height of 
. Another body with the double the mass thrown up with double the initial velocity will reach a maximum height of
. Another body with the double the mass thrown up with double the initial velocity will reach a maximum height of