Physics Year 7

What are unbalanced forces?

Forces that cause a change in the motion of an object.

What is the measurement unit for force?

Newtons (N)

What are simple machines?

Devices like levers, inclined planes, and wheels that provide mechanical advantages.

What is the difference between balanced and unbalanced forces?

Balanced forces do not change an object's motion, while unbalanced forces do.

How is net force calculated?

By using diagrams to sum up all the forces acting on an object.

What is gravitational force?

A force that attracts two bodies towards each other, proportional to their masses.

What are Newton's laws?

Three laws that describe the relationship between the motion of an object and the forces acting on it.

What is the difference between contact and non-contact forces?

Contact forces require physical interaction, while non-contact forces act at a distance.

How is pressure calculated?

Pressure is calculated by dividing force by area.

What is friction?

A force that opposes the motion of an object.

What are the characteristics of simple machines?

They reduce the effort needed to perform work by providing mechanical advantages.

What is the importance of conducting investigations in science?

To gather data and interpret findings effectively.

What is the mechanical advantage of a lever?

The factor by which the lever multiplies the effort force applied.

What role do magnetic and electrostatic forces play in motion?

They can either attract or repel objects, influencing their motion.