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Answer :
Answer:4.9m/s^2
Basically answer A
Explanation:
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The acceleration of the brick is 4.9 m/s².
What is acceleration?
Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.
Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.
Mass of the brick: m = 20 kg.
Weight of the brick: W = 196 N.
angle of inclination = 30°
The component of the weight, that gives acceleration = 196 sin30° N = 98 N.
According to Newton's 2nd law of motion, force can be defined as:
force applied = mass of the body × acceleration of body
The acceleration of the brick = force/mass = 98 N/20 kg = 4.9 m/s².
Learn more about acceleration here:
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