A car is designed to break the land speed record. The thrust exerted on the car is 230 kN at one instant of its motion. The mass of the car at this instant is 11 000 kg. (a) The acceleration of the car at this instant is 2.9 m s-2. Calculate the air resistance acting on the car (Assuming constant air-resistance). (b) The thrust on the car remains constant as the speed increases. Explain why, in real-life, the acceleration decreases and eventually reaches zero. (c) A supersonic car is attempting to break the land speed record on a horizontal track. When it is travelling at 320 ms-1, a small part P that is 1.5 m above the ground becomes detached from the car. The initial vertical velocity of P is 2.5 s-1 in the upwards direction. Calculate the time taken for the small part P to

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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A car is designed to break the land speed record. The thrust exerted on the car is
230 kN at one instant of its motion. The mass of the car at this instant is 11 000 kg.
(a) The acceleration of the car at this instant is 2.9 m s-2. Calculate the air
resistance acting on the car (Assuming constant air-resistance).
(b) The thrust on the car remains constant as the speed increases. Explain why, in
real-life, the acceleration decreases and eventually reaches zero.
(c) A supersonic car is attempting to break the land speed record on a horizontal
track. When it is travelling at 320 ms-1, a small part P that is 1.5 m above the
ground becomes detached from the car. The initial vertical velocity of P is 2.5 m
s-1 in the upwards direction. Calculate the time taken for the small part P to
reach the ground.
Transcribed Image Text:Q4 A car is designed to break the land speed record. The thrust exerted on the car is 230 kN at one instant of its motion. The mass of the car at this instant is 11 000 kg. (a) The acceleration of the car at this instant is 2.9 m s-2. Calculate the air resistance acting on the car (Assuming constant air-resistance). (b) The thrust on the car remains constant as the speed increases. Explain why, in real-life, the acceleration decreases and eventually reaches zero. (c) A supersonic car is attempting to break the land speed record on a horizontal track. When it is travelling at 320 ms-1, a small part P that is 1.5 m above the ground becomes detached from the car. The initial vertical velocity of P is 2.5 m s-1 in the upwards direction. Calculate the time taken for the small part P to reach the ground.
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