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2.1a - Fnet / m = a (11/8)
POSSIBLE POINTS: 14.29
a
A rope is attached to a block that has a weight of 120 N. When the rope exerts an upward force of 250
N on the block, what is the net force on the block?
A. 130 N up
B. 370 N up
C. 130 N down
D. 370 N down
О А
O
B
О С
OD

21a Fnet M A 118 POSSIBLE POINTS 1429 A A Rope Is Attached To A Block That Has A Weight Of 120 N When The Rope Exerts An Upward Force Of 250 N On The Block What class=

Sagot :

Explanation:

According to the free body diagram attached below, there are only two forces that are acting upon the block, namely the force tension of the rope acting upwards and the weight of the block acting downwards.

Therefore, the magnitude of the net (resultant) force exerted on the block is

                                            [tex]\vec{F}_{\text{net}} \ = \ \vec{F}_{\text{tension}} \ - \ \vec{F}_{\text{weight}} \\ \\ \vec{F}_{\text{net}} \ = \ 250 \ \text{N} \ - \ 120 \ \text{N} \\ \\ \vec{F}_{\text{net}} \ = \ 130 \ \text{N}[/tex].

Since the magnitude of [tex]\vec{F}_{\text{tension}}[/tex] > magnitude of [tex]\vec{F}_{\text{weight}}[/tex], this implies that the block will accelerate upwards.

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