6th ACC Unit 3 & 4 Review

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or state. For example, an apple sitting on the edge of a table has potential energy because it can fall.

Front

What is the formula to calculate force?

Back

Force (F) is calculated using the formula F = mass (m) × acceleration (a). For example, a 20 kg bike accelerating at 10 m/s² has a force of 200 Newtons.

Front

At which point in a pendulum's swing is kinetic energy highest?

Back

Kinetic energy is highest at the lowest point of the swing (Point 3) because the pendulum is moving fastest there.

Front

What does it mean when the net force is 0?

Back

When the net force is 0, it means that all the forces acting on an object are balanced. For example, if two elephants pull on a rope with equal force in opposite directions, the net force is 0.

Front

What is an action-reaction force pair?

Back

An action-reaction force pair is a pair of forces that are equal in size and opposite in direction. For example, when an ice skater pushes off a wall, the wall pushes back with equal force.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion. The faster an object moves, the more kinetic energy it has.

Front

What is the relationship between mass and acceleration in Newton's second law?

Back

According to Newton's second law, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Front

What is the unit of force?

Back

The unit of force is the Newton (N). One Newton is the force required to accelerate a one-kilogram mass by one meter per second squared.

Front

What happens to energy in a closed system?

Back

In a closed system, energy is conserved. It can change forms (e.g., from potential to kinetic) but cannot be created or destroyed.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object. It occurs when two surfaces come into contact.