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ICSE Class 9 Answered

A Porsche 911 accelerates from rest to 27ms^1 due north in 5.8 seconds the mass of the car is 1400 kg what is the magnitude and direction of the average net force that acts on the Porsche   the final answer is 6500 N
Asked by diksha.jadhav | 08 Sep, 2018, 06:22: PM
answered-by-expert Expert Answer
Force = mass × acceleration
 
acceleration a is obtained from equation, " v = u+a×t ", where v is final velocity, u is initial velocity.
 
since the vehicle starts from rest, we have u =0 and v = 27 m/s
 
acceleration a = 27/5.8 = 4.66 m/s2
 
force = 1400×4.66 = 6517 N
 
direction is same as the direction of acceleration, due north
Answered by Thiyagarajan K | 09 Sep, 2018, 02:01: PM
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