Vocabulary
A push, pull or twist
What is a force?
An invisible force that pulls objects toward each other due to their mass
What is gravity?
Friction
What is contact force?
What is one way of increasing friction?
Tread on tyres or shoes, making the surface rougher, increasing the surface area between objects, by removing a lubricant, by pressing the surface together harder
The sum of all the forces
What is net force?
The unit used to measure force
What is Newtons?
A force that occurs when two surfaces are rubbing against each other
What is friction?
Gravity
What is non-contact force?
What is one way of reducing friction?
Adding wheels to a heavy object, adding a lubricant, make the object more streamlined, smooth the surfaces, reduce the contact between the surfaces, lighten the load
Kim pushes a box with 200N of force to the left, whilst a frictional force of 150N was also acting on the box. The net force is
What is 50N left?
Two forces equal in size and opposite in direction
What are balanced forces?
The force acting between magnets and magnetic objects
What is magnetic force?
Buoyancy
What is a contact force?
Used to slow the movement of falling people when sky diving
What is a parachute?
Force upward of 200N, force downward of 600N
What is a net force of 400N down?
The amount of matter in a substance
What is mass?
Another name for air resistance
What is drag?
Tension
What is a contact force?
To apply a substance so as to reduce friction.
What is lubrication?
A mass of 65kg on Earth would be how much in space?
What is a mass of 65kg?
A measure of the gravitational pull on an object
What is weight?
The force transmitted through a rope, string or wire when pulled by forces acting from opposite sides.
What is tension?
Electrostatic force
What is a non-contact force?
To design or create a form that presents very little resistance to the flow of air or water, thus increasing speed and ease of movement.
What is streamlining?
A mass of 50kg on Earth, how much will you weigh?
What is 500 Newtons? (490N if using 9.8m/s/s)