Question

A block of mass 4 kg lies over a horizontal surface [g=10 m/s^2]. The normal reaction between the block and the surface is

1 point

10 N

30 N

40 N

1 N


answer fast pleaseeee!! it's too urgent​

Answer 1

Explanation:

the formula is mg

here m=4kg

g=10m/s

mg=40N

Answer 2

Given:

A block of mass 4 kg lies over a horizontal surface [g=10 m/s²].

To find:

Normal reaction between block and surface?

Calculation:

• From Newton's 3rd law, we know that any action has an equal and opposite reaction.

• So, when the block is placed on the surface, it experiences a normal reaction force upwards which is equal and opposite to the weight of the block.

$\therefore \: N = mg$

$\implies \: N = 4 \times 10$

$\implies \: N = 40 \: Newton$

So, the normal reaction is 40 N.