3.2.1: Dynamics

Question 1

Tension

Answer 1

A pulling force caused by two or more forces acting on an object in opposite directions. The forces act to try and stretch the object

Question 2

Compression

Answer 2

The decrease in length of an object when a compressive force is exerted on it

Question 3

Newton

Answer 3

The force that causes 1kg to have an acceleration of 1ms^-2 in the direction of the force

Question 4

Friction

Answer 4

The resistive force on an object that is caused by two surfaces being in contact and that acts in the opposite direction to motion

Question 5

Thrust

Answer 5

A force from an engine that is usually propulsive

Question 6

Weight

Answer 6

Gravitational force acting on an object, proportional to its mass

Question 7

Free-body diagrams

Answer 7

Simple representations of multiple force acting on a single object, used to show or to work out the resultant force acting on the object

Question 8

Lift

Answer 8

A force caused by the flow of fluid around an object, which acts perpendicular to fluid flow. Often acts in the upwards direction

Question 9

Normal contact force

Answer 9

A reaction force exerted by a surface on an object, which acts perpendicular to the surface