How long will it take a force of 10 N to stop a mass of 2.5 kg which is moving at 20m/s?
Answers
Answered by
1
Answer:
5 seconds
Explanation:
F=ma
a is acceleration here
a=F/m=10/2.5=4
now a=v/t
so t=v/a=20/4=5 seconds
Answered by
2
Explanation:
since force is in opposite direction .
therefore it is considered as negative
we know that,
F = m × a
-10 = 2.5 × a
a = -10/2.5
a = -4 m/s square
v = u + at
0 = 20 + (-4)×t
-20 = -4t
t = 5 seconds
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