EVERYDAY SCIENCE

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PHYSICAL SCIENCES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Freely falling objects accelerate at 9.8 m/s2 because the force of ____ acts on them.
A
speed
B
direction
C
velocity
D
gravity
Explanation: 

Detailed explanation-1: -The acceleration due to gravity at or near Earth’s surface is 9.8 m/s2. Gravity is a force that pulls objects down toward the ground. When objects fall to the ground, gravity causes them to accelerate. Acceleration is a change in velocity, and velocity, in turn, is a measure of the speed and direction of motion.

Detailed explanation-2: -g = 9.8 m/s2 This means that every second an object is in free fall, gravity will cause the velocity of the object to increase 9.8 m/s. So, after one second, the object is traveling at 9.8 m/s.

Detailed explanation-3: -Complete answer: This only force acting on this object in free fall is the gravitational force which is equal to weight of the object. The weight of the object includes the value of acceleration equal to the acceleration due to gravity.

Detailed explanation-4: -As the definition states, an object is in free fall if the only force acting upon the object is the force of gravity. Regardless of which direction the object moves or how fast the object moves, if the only force acting upon the object is gravity, then the object is free-falling.

Detailed explanation-5: -The acceleration of gravity (also referred to as the gravitational field strength) at the surface of the earth has an average of 9.807ms2, which means that an object dropped near earth’s surface will accelerate downward at that rate.

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