S1 Final Physical Science

Front

What is net force?

Back

The net force is the overall force acting on an object when all the individual forces are combined. It determines the object's acceleration and direction.

Front

What unit is used to measure force?

Back

Forces are measured in Newtons (N).

Front

What is kinetic energy (KE)?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

If a 1 kg soccer ball is moving at 10 m/s, what is its kinetic energy?

Back

50 J (KE = 1/2 * 1 kg * (10 m/s)² = 50 J).

Front

What is potential energy (PE)?

Back

Potential energy is the energy stored in an object due to its position or state, often related to height in a gravitational field.

Front

When does an object have the most potential energy?

Back

An object has the most potential energy at its highest point in a gravitational field.

Front

What is a force?

Back

A force is a push or pull on an object that can cause it to accelerate, change direction, or change shape.

Front

What is the relationship between force and acceleration?

Back

According to Newton's second law, force equals mass times acceleration (F = ma).

Front

What is the formula for calculating net force?

Back

Net force is calculated by summing all the individual forces acting on an object, taking direction into account.

Front

What happens to an object's motion if the net force is zero?

Back

If the net force is zero, the object will remain at rest or continue to move at a constant velocity.