Force and Friction

1. Force

1.1. Effects of force

1.1.1. move a stationary object

1.1.2. change the speed

1.1.3. Stop a moving object

1.1.4. change the direction of moving object

1.1.5. change the shape of object

1.2. Types of force

1.2.1. Contact force

1.2.1.1. Muscular Force

1.2.1.2. Friction

1.2.2. Non-contact force

1.2.2.1. Gravitational Force

1.2.2.2. Electrostatic force

1.2.2.3. Magnetic force

1.3. measuring force

1.3.1. spring balance

1.3.2. Measured in NEWTONS

2. Friction

2.1. Caused due to interlocking between ridges and grooves on surfaces

2.2. Factors affecting friction

2.2.1. Mass of a body

2.2.2. Nature of surface

2.3. Types of friction

2.3.1. Static friction

2.3.2. Sliding friction

2.3.3. Rolling friction

2.4. Fluid friction

2.4.1. In air

2.4.2. In water

2.4.3. factors affecting fluid friction

2.4.3.1. shape of object

2.4.3.2. speed of object

2.4.3.3. nature of object