Forces

Front

What is friction?

Back

Friction is a force that opposes the motion of an object when it comes into contact with another surface.

Front

What are the two main types of friction?

Back

The two main types of friction are static friction (preventing motion) and kinetic friction (opposing motion when sliding).

Front

How can friction be reduced?

Back

Friction can be reduced by making surfaces smoother, using lubricants, or changing the type of friction (e.g., from sliding to rolling).

Front

What is the role of lubricants?

Back

Lubricants, such as oils and greases, reduce friction between surfaces, allowing them to move more easily.

Front

What is gravity?

Back

Gravity is a force that attracts two bodies towards each other, with Earth’s gravity pulling objects towards its center.

Front

What is the acceleration due to gravity on Earth?

Back

The acceleration due to gravity on Earth is approximately 9.8 m/s².

Front

What does a free-body diagram represent?

Back

A free-body diagram represents all the forces acting on an object, showing their direction and magnitude.

Front

What is a balanced force?

Back

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

Front

What is an unbalanced force?

Back

Unbalanced forces are not equal and can cause an object to start moving, stop moving, or change direction.

Front

What is the effect of friction on motion?

Back

Friction can slow down or stop the motion of an object, depending on the surfaces in contact.