uiz #4 Newtons second law and free fall F2024

Front

What does Newton's second law state about the relationship between force, mass, and acceleration?

Back

Newton's second law states that the force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma).

Front

How does increasing the mass of an object affect its acceleration when a constant force is applied?

Back

Increasing the mass of an object decreases its acceleration when a constant force is applied, according to Newton's second law.

Front

What is free fall and what forces act on an object in free fall?

Back

Free fall is the motion of an object under the influence of gravitational force only, with no other forces acting on it.

Front

Define displacement and how it differs from distance. Give an example.

Back

Displacement is the shortest distance from the initial to the final position of an object, including direction. For example, if a boomerang is thrown and returns to the starting point, its displacement is 0m, while the distance traveled is the length of the path taken.

Front

What is a vector quantity? Provide two examples.

Back

A vector quantity has both magnitude and direction. Examples include velocity and force.

Front

What is the significance of net force in determining an object's motion?

Back

The net force determines the acceleration of an object; if the net force is zero, the object will not accelerate (it remains at rest or in uniform motion).

Front

Explain the concept of inertia as described in Newton's first law of motion.

Back

Inertia is the tendency of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion continues in motion at a constant velocity unless acted upon by a net external force.

Front

What is the formula for calculating gravitational force between two objects?

Back

The gravitational force between two objects is calculated using Newton's law of universal gravitation: F = G * (m1 * m2) / r^2, where G is the gravitational constant, m1 and m2 are the masses of the objects, and r is the distance between their centers.

Front

How does the acceleration due to gravity affect objects in free fall?

Back

All objects in free fall near the Earth's surface accelerate downwards at approximately 9.81 m/s², regardless of their mass.

Front

What is the difference between static and dynamic equilibrium?

Back

Static equilibrium occurs when an object is at rest and the net force acting on it is zero. Dynamic equilibrium occurs when an object is moving at a constant velocity and the net force is also zero.