Speed - The distance covered in a given time, measured in m.s-1. Acceleration - The change in speed over time, measured in m.s-2. Forces - These cause objects to speed up, slow down, change direction or change shape. Balanced - When forces are balanced, the net force is zero. Newtons - The units for force. Friction - A contact force that opposes the direction of an object’s motion. Magnetism - A non-contact force that can occur between objects that contain iron. Electrostatic - A non-contact force that occurs between objects with electrical charge. Gravity - A non-contact force that occurs between any two masses. Weight - The force that occurs as the result of a gravitational field acting on a mass. Accelerate - If unbalanced forces act on an object that is free to move, the object will do this. Mass - The amount of matter in an object, measured in kg. Density - The amount of matter in a given volume, measured in kg.l-1. Momentum - The tendency of an object to keep moving in the same direction. This is a combination of the object’s mass and speed. Energy - The capacity to do work. Joules - The units for energy. Kinetic - The type of energy that moving objects have. Gravitational potential - The energy stored in objects that are held at a height. Work - The transfer of energy from one form to another. Efficiency - The percentage of energy that is converted to useful energy. Power - A measure of how fast work is done. Watts - The units of power.
Speed - The distance covered in a given time, measured in m.s-1.
Acceleration - The change in speed over time, measured in m.s-2.
Forces - These cause objects to speed up, slow down, change direction or change shape.
Balanced - When forces are balanced, the net force is zero.
Newtons - The units for force.
Friction - A contact force that opposes the direction of an object’s motion.
Magnetism - A non-contact force that can occur between objects that contain iron.
Electrostatic - A non-contact force that occurs between objects with electrical charge.
Gravity - A non-contact force that occurs between any two masses.
Weight - The force that occurs as the result of a gravitational field acting on a mass.
Accelerate - If unbalanced forces act on an object that is free to move, the object will do this.
Mass - The amount of matter in an object, measured in kg.
Density - The amount of matter in a given volume, measured in kg.l-1.
Momentum - The tendency of an object to keep moving in the same direction. This is a combination of the object’s mass and speed.
Energy - The capacity to do work.
Joules - The units for energy.
Kinetic - The type of energy that moving objects have.
Gravitational potential - The energy stored in objects that are held at a height.
Work - The transfer of energy from one form to another.
Efficiency - The percentage of energy that is converted to useful energy.
Power - A measure of how fast work is done.
Watts - The units of power.