Question

A body has weight 20N . How much force is required to move it vertically upward with an acceleration of 2ms-2

Answer 1

Answer:

The mass of the body is obtained by dividing the weight by acceleration due to gravity 'g' approximately taken as 10 m/sec/sec. Mass = 20 /10 ≈ 2 kg. The upward force must offset the weight acting downwards and additionally provide a force = 2 *2 = 4 N.

Answer 2

Answer:

24 N force is required to move body upward with acceleration 2m/s².

for explanation refer attachment

CONCEPT USED :

• Newton's second law
• total external force on body is equal to mass multiplied by acceleration of body.

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