Unit 3 Dynamics

Front

What is the definition of balanced forces?

Back

Balanced forces are forces that are equal in size and opposite in direction, resulting in no change in motion.

Front

What does a constant velocity indicate about the net force acting on an object?

Back

A constant velocity indicates that the net force acting on the object is zero.

Front

How does mass affect acceleration in a system with multiple blocks?

Back

In a system with multiple blocks, if the mass of one block increases while the net force remains constant, the acceleration of the system decreases.

Front

What is the relationship between net force and acceleration according to Newton's second law?

Back

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

Front

What happens to the perceived weight of a person in an elevator when it accelerates upward?

Back

When an elevator accelerates upward, a person feels heavier than normal due to the increased normal force acting on them.

Front

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

Back

The direction of the net force determines the direction of the object's acceleration and, consequently, its motion.

Front

What does it mean for an object to have a changing velocity?

Back

An object has a changing velocity when it is either speeding up, slowing down, or changing direction.

Front

What is the effect of friction on the motion of an object?

Back

Friction opposes the motion of an object, reducing its speed and affecting its acceleration.

Front

How can you determine if forces acting on an object are unbalanced?

Back

Forces are unbalanced if their vector sum does not equal zero, resulting in a net force that causes acceleration.

Front

What is the formula for calculating acceleration?

Back

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