Question

A object starting from rest acquires a velocity of 25m/s in 10s .If mass of object is 3kg .Find Force applied on the object. Hint:- Find Acceleration then Use newtons second law.
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Answer 1

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Answer 2

• 7.5N

Explanation:

Given:

u= 0m/s

v= 25m/s

t= 10s

m= 3kg

We know that:

$v= u+at \\ ∴ 25= 0+a×10 \\a= 2.5 m/s²$

Now,

We know that:

$F= ma [Newton's second law] \\F= 3×2.5 = 7.5N$