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Questions and Answers
Match the following terms with their definitions:
Match the following terms with their definitions:
Weight = Force exerted on an object due to gravity Acceleration due to gravity = Rate of change of velocity as an object falls g = Value representing acceleration due to gravity on Earth Free fall = Motion of an object falling under the influence of gravity
Match the factors affecting acceleration due to gravity with their effects:
Match the factors affecting acceleration due to gravity with their effects:
Distance from the center of the planet = Decreases acceleration due to gravity Mass of the planet = Increases acceleration due to gravity Shape of the planet = Greater acceleration near the poles Altitude = Decreases acceleration due to gravity
Match the following values with their descriptions:
Match the following values with their descriptions:
9.8 ms-2 = Acceleration due to gravity on Earth 10 ms-2 = Approximate value of acceleration due to gravity 0 ms-2 = Acceleration in the absence of gravity Height = Influences velocity upon falling objects
Match the following scenarios with their outcomes:
Match the following scenarios with their outcomes:
Match the following symbols with their meanings:
Match the following symbols with their meanings:
Match the following objects with their gravitational influences:
Match the following objects with their gravitational influences:
Match the following consequences with the correct cause:
Match the following consequences with the correct cause:
Match the following descriptions with the correct terms:
Match the following descriptions with the correct terms:
Match the following statements with their correctness:
Match the following statements with their correctness:
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Study Notes
Gravity and Weight
- Gravity is a force that attracts objects towards the Earth's center.
- The weight of an object is the force acting on it due to gravity, varying by location.
- Gravity is stronger closer to the Earth's center and weaker at greater distances.
Acceleration Due to Gravity
- The acceleration experienced by an object in free fall is known as acceleration due to gravity, denoted by 'g.'
- The value of 'g' on Earth is approximately 9.8 m/s², often rounded to 10 m/s².
- Every second of free fall, an object's velocity increases by 9.8 m/s due to gravity.
- Objects falling from greater heights reach higher velocities than those from lower heights.
Factors Affecting Acceleration Due to Gravity
- Distance from Earth's Center: Acceleration decreases as the distance from the center increases.
- Mass of the Planet: Greater mass leads to increased gravitational acceleration.
- Shape of the Planet: Gravity is stronger at the poles than at the equator, due to the Earth's oblate shape.
- Altitude: Acceleration decreases with increasing altitude.
Weight Calculation
- Weight is calculated with the formula: W = m x g, where 'W' is weight, 'm' is mass, and 'g' is acceleration due to gravity.
- As 'g' varies with location, an object's weight also changes based on its location.
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