Laws Of Motion Question 290

Question: The force required to stop a car of mass 800 kg, moving at a speed of 20ms1 over a distance of 25m in 2.5 sec is

Options:

A) 1200N

B) 6400 N

C) 1600N

D) 1800N

Show Answer

Answer:

Correct Answer: B

Solution:

[b] As we know, |a|=|v2u22S|=40050=8 m/s2. So force required =F=ma

=800×8=6400N



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