A scooter is moving with a velocity of 20m/s when brakes are applied.The mass of the scooter and the rider is 180kg.The constant force applied by the brakes is 500N.
How long should the brakes applied to make the scooter comes to a halt?
How far does the scooter travel before it come to rest?

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Solution

$I n i t i a l v e l o c i t y = 20 m / s m a s s = 180 k g f o r c e a p p l i e d i s 500 N f = 500 N m a = 500 a = \frac{500}{180} = \frac{25}{9} m / s^{2} f i n a l v e l o c i t y v = 0 v = u - a t n e g a t i v e s i g n s t a t e s t h a t v e l o c i t y i s d e c r e a \sin g w i t h t i m e . 0 = 10 - \frac{25}{9} t t = 3.6 s D i s \tan c e t r a v e l l e d s = u t - \frac{1}{2} a t^{2} s = 54 m$

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A scooter is moving with a velocity of 20m/s when brakes are applied.The mass of the scooter and the rider is 180kg.The constant force applied by the brakes is 500N.How long should the brakes applied to make the scooter comes to a halt?How far does the scooter travel before it come to rest?

Initial velocity = 20 m/smass = 180 kgforce applied is 500 Nf = 500 Nma = 500a = 500180 = 259 m/s2final velocity v = 0v = u - atnegative sign states that velocity is decreasing with time.0 = 10 - 259tt = 3.6 sDistance travelled s = ut - 12at2s = 54 m

A scooter is moving with a velocity of 20m/s when brakes are applied.The mass of the scooter and the rider is 180kg.The constant force applied by the brakes is 500N.
How long should the brakes applied to make the scooter comes to a halt?
How far does the scooter travel before it come to rest?