A) A motorcycle ismoving at 40 m/s when the rider appliesthe breaks, giving moto

Question

A) A motorcycle ismoving at 40 m/s when the rider appliesthe breaks, giving motorcycle a constant deceleration. During the3 s interval immediately after breakingbegins, the speed decreases to 15m/s. i) What distance does the motorcycletravel from the instant breaking begin until the motorcyclestops? ii) What is the velocity of themotorcycle 2 s after the breaking? --------------------------------------------------------------------------------------------------------- B) An electricvehicle starts from rest and accelerates at a rate of 6m/s2 in a straight line until it reaches aspeed of 108 km/hr. The vehicle thenslows at a constant rate of 3m/s2. i) Find the velocity of the vehicle4 s after starting to slow down. ii) How much time elapses from startto stop? iii) How far does the vehicle travelfrom start to stop? --------------------------------------------------------------------------------------------------------- A) A motorcycle ismoving at 40 m/s when the rider appliesthe breaks, giving motorcycle a constant deceleration. During the3 s interval immediately after breakingbegins, the speed decreases to 15m/s. i) What distance does the motorcycletravel from the instant breaking begin until the motorcyclestops? ii) What is the velocity of themotorcycle 2 s after the breaking? --------------------------------------------------------------------------------------------------------- B) An electricvehicle starts from rest and accelerates at a rate of 6m/s2 in a straight line until it reaches aspeed of 108 km/hr. The vehicle thenslows at a constant rate of 3m/s2. i) Find the velocity of the vehicle4 s after starting to slow down. ii) How much time elapses from startto stop? iii) How far does the vehicle travelfrom start to stop? ---------------------------------------------------------------------------------------------------------

Explanation / Answer

(1)   Required distance S = [ v ^ 2- u ^ 2 ]/ 2a

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