A car in a highway is accelerated uniformly from rest with an acceleration of 4m/s for...
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A car in a highway is accelerated uniformly from rest with an acceleration of 4m/s for 4 seconds. Then it maintains its velocity for 6 seconds. Finally it is brought to rest at a road junction with uniform deceleration in another 3 seconds. (i) What is the velocity of the car just after the first 4 seconds? (ii) What is the deceleration during the last 3 seconds? (5 marks) (5 marks) (iii) By sketching a velocity-time graph, find the total distance travelled by the car. (5 marks) A car in a highway is accelerated uniformly from rest with an acceleration of 4m/s for 4 seconds. Then it maintains its velocity for 6 seconds. Finally it is brought to rest at a road junction with uniform deceleration in another 3 seconds. (i) What is the velocity of the car just after the first 4 seconds? (ii) What is the deceleration during the last 3 seconds? (5 marks) (5 marks) (iii) By sketching a velocity-time graph, find the total distance travelled by the car. (5 marks)
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Solution i Velocity after 4 seconds Using the formula for velocity under constant acceleration v u at where v is the final velocity u is the initial v... View the full answer
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