A car is moving with a uniform velocity of 20 meter per second. It is brought to rest in 5 s by the application of brakes. What is the distance travelled by the car during this time interval ?

Dear Student
u = 20 m/sv =0 m/st = 5sv = u +ata =v-ut =0-205 =- 4 m/s2Negative sign shows that speed is decreasing that retardations= ut +12at2s =20×5 +12×-4×5×5s =100-50 = 50 m

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