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Physics Chapter on Gravity

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Questions and Answers

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:

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:

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:

Object falling from greater height = Reaches ground with higher velocity Object at sea level = Experiences standard acceleration due to gravity Object at high altitude = Experiences decreased acceleration due to gravity Object near the poles = Experiences increased acceleration due to gravity Signup and view all the answers

Match the following symbols with their meanings:

m/s = Meters per second, unit of velocity g = Symbol for acceleration due to gravity h = Symbol for height F = Force exerted on an object Signup and view all the answers

Match the following objects with their gravitational influences:

Earth = Provides standard g value of 9.8 ms-2 Moon = Has lesser gravitational pull compared to Earth Jupiter = Greater mass leads to increased gravitational pull Saturn = Has an oblate shape affecting localized g Signup and view all the answers

Match the following consequences with the correct cause:

Increased mass = Leads to increased weight Decreased altitude = Leads to increased acceleration due to gravity Falling from a high place = Results in higher impact velocity Moving toward the equator = Results in decreased acceleration compared to poles Signup and view all the answers

Match the following descriptions with the correct terms:

Constant value near Earth's surface = Acceleration due to gravity Effect of gravity on a body's mass = Weight Vertical motion under gravity = Free fall Conditions altering g = Altitude and planet mass Signup and view all the answers

Match the following statements with their correctness:

Gravity is the same everywhere on Earth = False, it varies with altitude All objects fall at the same rate without resistance = True Higher altitude means higher weight = False, it decreases Location affects weight more than mass = True Signup and view all the answers

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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Description

This quiz covers the fundamental concept of gravity and its effects on weight and acceleration. Explore how the force of gravity varies with location and learn about the standard value of gravitational acceleration on Earth. Test your understanding of how gravity influences objects in motion.