PS.5.2.1 (5.P.1.1) #1: Schoolnet

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 is gravity?

Back

Gravity is the force that attracts two bodies towards each other, commonly experienced as the force that pulls objects towards the Earth.

Front

What happens to the speed of an object when its mass increases?

Back

The speed of an object generally decreases when its mass increases, assuming the same amount of force is applied.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a force.

Front

How does a smoother surface affect the speed of a rolling object?

Back

A smoother surface reduces friction, allowing the object to roll faster.

Front

What is momentum?

Back

Momentum is the quantity of motion an object has, which depends on its mass and velocity. It is calculated as momentum = mass x velocity.

Front

What effect does reducing mass have on the force needed to move an object?

Back

Reducing mass decreases the force needed to move an object, making it easier to push or pull.

Front

What is the relationship between mass and gravity?

Back

The force of gravity acting on an object is directly proportional to its mass; heavier objects experience a greater gravitational force.

Front

What is the role of a ramp in increasing the speed of an object?

Back

A ramp allows an object to gain height and potential energy, which converts to kinetic energy as it rolls down, increasing its speed.

Front

What is the effect of surface texture on friction?

Back

Rougher surfaces create more friction, while smoother surfaces create less friction.