Forces and Motions Flashcards
V=?
V=d/t
1ms-1= ?km/h-1
1ms-1= 3.6km/h-1
What is a force measured in?
Newtons
What effects can a force have on an object?
A force can change an objects speed, direction and shape
What is mass?
The amount of matter that an object is made out of so it is constant. Mass is measured in Kg.
What is weight?
Weight is the amount of gravitational force on an object. Weight is dependant on gravitational field strength and is measured in Newtons.
State Newtons first law
An object will remain at rest, or move at a constant speed, unless acted upon by an unbalanced external force.
List 5 contact forces
-Push (Compression)
- Pull (Tension)
- Buoyancy
- Air resistance
- Friction
List 3 non-contact forces
- Gravity
- Electrostatic
- Magnetism
What is the difference between contact and non-contact forces?
Non-contact forces are forces that act on an object without the need for physical contact. Contact forces are forces that require direct physical contact between two object
Explain how contact and non-contact forces are used
Contact force occurs due to the contact between two different objects. Non-contact force occurs due to either attraction or repulsion between two objects such that there is no contact between these objects.
State Newton’s Third Law
For every force in nature there is an equal and opposite reaction.
Apply Newton’s Third Law to the motion of an object
When you push a box along the floor opposite forces are applied on in such as air resistance and friction.
What is torque?
A force acting about a pivot to create a turning effect
What is torque measured in?
Newton metres
