Physics-Semester 1 Final Review

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to accelerate, change direction, or change shape. For example, a car accelerating down a hill experiences an unbalanced force.

Front

How do you calculate weight on the Moon?

Back

Weight on the Moon can be calculated using the formula: Weight = mass × gravity. For example, Nancy has a mass of 30 kg and the gravity on the Moon is 1.62 m/s², so her weight is 30 kg × 1.62 m/s² = 48.6 N.

Front

What is impulse in physics?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time. It is equal to the product of the average force and the time duration over which the force acts.

Front

Define weight in the context of physics.

Back

Weight is the force of gravity acting on an object. It is calculated as the product of the object's mass and the acceleration due to gravity (Weight = mass × gravity).

Front

What is the formula for calculating weight on Earth?

Back

Weight on Earth can be calculated using the formula: Weight = mass × 9.81 m/s² (where 9.81 m/s² is the acceleration due to gravity on Earth).

Front

What is the difference between mass and weight?

Back

Mass is a measure of the amount of matter in an object, while weight is the force exerted by gravity on that mass. Mass is constant regardless of location, but weight can change depending on the gravitational field.

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's second law of motion, the relationship is given by the formula: Force = mass × acceleration (F = ma). This means that the force acting on an object is equal to the mass of the object multiplied by its acceleration.

Front

What is gravitational force?

Back

Gravitational force is the attractive force between two masses. It is proportional to the product of the masses and inversely proportional to the square of the distance between their centers, as described by Newton's law of universal gravitation.

Front

What is inertia?

Back

Inertia is the property of an object to resist changes in its state of motion. An object at rest will stay at rest, and an object in motion will continue in motion at a constant velocity unless acted upon by an unbalanced force.

Front

How does acceleration relate to unbalanced forces?

Back

Acceleration is produced when an unbalanced force acts on an object. The greater the unbalanced force, the greater the acceleration, according to Newton's second law (F = ma).