Physics Concepts - Forces and motion 1

Newton Meter

• A device used to measure the magnitude of a force.

• A tool for measuring temperature.

• An instrument for measuring speed.

• A device for measuring distance.

Braking Distance

• The distance a vehicle travels under the braking force, affected by road and weather conditions and the vehicle's condition.

• The distance a vehicle travels before it starts to brake.

• The distance a vehicle travels after the brakes have been applied until it comes to a complete stop.

• The distance a vehicle can travel without any external forces acting on it.

Balanced Forces

• A resultant force of zero.

• A force that causes an object to accelerate.

• A force that changes the direction of an object.

• A force that is always greater than other forces.

Human Reaction Time

• The time it takes for the brain to react to a stimulus, typically between 0.2-0.9 seconds.

• The time it takes for the brain to process information, usually around 1-2 seconds.

• The time it takes for a person to respond to a question, generally less than 0.1 seconds.

• The time it takes for the body to recover from fatigue, often several minutes.

Distance-Time Graph

• A plot of how an object’s distance changes over time. The gradient equals the object's speed at that point.

• A representation of an object's speed over time.

• A graph showing the acceleration of an object.

• A chart that displays the total distance traveled by an object.

Elastic Limit

• The maximum stress that a material can withstand without permanent deformation.

• The point at which a material begins to fracture.

• The force beyond which an object will no longer deform elastically and will deform plastically.

• The ability of a material to return to its original shape after deformation.

Friction

• A force that accelerates objects in motion.

• A resistive contact force that acts to oppose the relative motion between two surfaces.

• A force that increases the speed of an object.

• A force that only acts on stationary objects.

Newton Metre

• The unit of a moment.

• A unit of force.

• A unit of energy.

• A unit of power.

Equilibrium

• An object is in equilibrium if the resultant force is equal to zero.

• An object is in equilibrium if it is at rest only.

• An object is in equilibrium if it is moving at a constant speed.

• An object is in equilibrium if the net force is greater than zero.

Acceleration

• The rate of change of velocity. It can be calculated from the gradient of a velocity-time graph.

• The total distance traveled divided by the total time taken.

• The change in speed over a fixed distance.

• The force applied to an object divided by its mass.