Question

Q1. If there is a block of mass 2kg, and a force of 20 N is acting on it in the
positive x-direction, and a force of 30 N in the negative x-direction, then what
would be its acceleration?

Answer 1

Answer:

acceleration of the body 5 m/s^2 along the -a axis direction

Answer 2

Answer:

The acceleration is $5m/s^{2}$ and direction is negative $x$ axis.

Explanation:

It is given that $m=2kg$

$F=20N$ is acting in $+x$ direction.

$F=30N$ is acting in $-x$ direction.

We need to determine the acceleration.

Acceleration is the rate of change of the velocity of an object with respect to time.

From Newton's second law of motion,

$F=ma$

Here $F$ is net force.

Here, net force is in $-x$ direction and magnitude is $30-20=10N$

Hence,

$10=2*a$

$a=5m/s^{2}$

Direction is negative $x$ axis.

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