Flashcard 7

Front

What is Newton's Second Law of Motion?

Back

Newton's Second Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. It can be expressed with the formula F = ma, where F is the force, m is the mass, and a is the acceleration.

Front

What happens to the speed of a projectile at its maximum height?

Back

At its maximum height, the vertical component of the projectile's speed is 0 m/s, but the horizontal component remains constant. Therefore, the total speed is equal to the horizontal speed.

Front

How does mass affect the force of friction?

Back

The force of friction is proportional to the normal force, which is affected by the mass of the object. More mass means a greater normal force, leading to a higher force of friction.

Front

What is the relationship between speed and required friction force for circular motion?

Back

The required friction force for an object in circular motion increases with the square of its speed. If speed doubles, the required friction force increases by a factor of four.

Front

What is the definition of acceleration?

Back

Acceleration is the rate of change of velocity of an object. It can be caused by a change in speed or direction.

Front

What is the formula for calculating acceleration?

Back

Acceleration (a) can be calculated using the formula a = (final velocity - initial velocity) / time.

Front

What is the role of air resistance in projectile motion?

Back

Air resistance opposes the motion of a projectile, reducing its speed and altering its trajectory compared to a vacuum where no air resistance exists.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

What does it mean for an object to be in uniform motion?

Back

An object is in uniform motion if it travels equal distances in equal intervals of time, maintaining a constant speed and direction.

Front

What is the significance of the angle in projectile motion?

Back

The angle of projection affects the range and height of the projectile. A 45-degree angle typically provides the maximum range.