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## when we apply brakes in the car,it retards the motion;although it is an internal force.why?

Asked by 26th February 2008 6:05 PM

## A car running at a speed of 72 km/hr is slowed down to 18 km/hr over a distance of 40 m.Calculate :(1) the retardation produced by the brakes.(2)time for which brakes are applied?

Asked by nisha_vini29 3rd July 2017 12:24 PM

### NEET1 ALL Class Kinematics

Asked by Arushi Juyal 16th December 2017 6:39 AM

## a cyclist is moving at a uniform speed of 20 m/s for 30 s.He then stops pedalling and stops in next 10 s.Calculate : (1) average retardation ? (2) total distance travelled ?

Asked by nisha_vini29 22nd May 2018 11:16 PM

## A bullet fired with a speed of 50m/s is stopped by a depth of 10 cm by a wall.What is the retardation offered by  wall ?

Asked by nishola82 22nd May 2018 11:30 PM

## Difference between retardation and acceleration on points.

Asked by Kavyasharma 20th June 2018 3:57 PM

## The relation between distance 'x' and time 't' is t = A(x^2) + Bx , where A and B are constants . The retardation is ?

Asked by arunavamitra50 21st June 2018 6:57 AM

## a bullet of mass 10 g travels with speed 500 m/s on striking a wooden target it penetrates 0.5 m inside calculate kinetic energy and resistive force

Asked by Samrat 28th June 2018 11:41 AM

## A ball of mass 100 gram moving with a velocity of 20 m per second is brought to rest in 0.02 second find the average retarding force acting on the ball

Asked by Samrat 29th June 2018 10:11 PM

## a motar car starts from rest and accelerate uniformly for 10s to a velocity of 30m/s it then runs at a constant speed and it is finally brought to rest in 80m in constant retardation total distane covered is 830m find the value of acceleration ,retardation,total time taken

Asked by gargpuneet989 7th July 2018 6:26 PM

## Ques 38

Asked by rbhatt16 10th July 2018 11:46 PM