Dynamics

Question 1

Tension

Answer 1

Tension is 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

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

Question 3

Newton

Answer 3

One newton is the force that causes 1kg to have an acceleration of 1ms-2 in the direction of the force

Question 4

Friction

Answer 4

Friction is 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. e.g. the force generated by a rocket engine

Question 6

Weight

Answer 6

Gravitational force acting on an object, proportional to its mass. On Earth: W = mg

Question 7

Lift

Answer 7

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

Question 8

Normal Contact Force

Answer 8

The normal contact force is a reaction force exerted by a surface on an object, which acts perpendicular to the surface