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What horizontally-applied force will accelerate a 400-kg crate at 1 m/s^2 across a factory room floor against a friction force of half its weight? A) 600 N B) 1600 N C) 2000 N D) 2400 N E) None of the
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What horizontally-applied force will accelerate a 400-kg crate at 1 m/s^2 across a factory room floor against a friction force of half its weight?

A) 600 N B) 1600 N C) 2000 N D) 2400 N E) None of the above

User Ylzhang
by
5.0k points

1 Answer

4 votes

Answer:

option D

Step-by-step explanation:

given,

mass of the crate = 400 Kg

acceleration of the crate = 1 m/s²

frictional force = half its weight

weight of the crate,= mg

= 400 x 10 = 4000 N

frictional force,f = 0.5 x 4000 = 2000 N

using newtons second law

F - f = m a

F = m a + f

F = 400 x 1 + 2000

F = 2400 N

Horizontal force applied is equal to 2400 N

The correct answer is option D

User Beanish
by
4.7k points
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