# P2 : Forces and Their Effects - Flash Cards [H]

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The gradient on Distance-Time graphs equals?
Speed.
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A flat line on Distance-Time graphs means what?
The object is at a stationary position.
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A straight line going uphill or downhill on Distance-Time graphs means what?
The object is travelling at a steady speed.
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The steeper the line on Distance-Time graphs means what?
The object is going faster.
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Downhill sections on Distance-Time graphs means what?
The object is going back to it's starting point.
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Curves on Distance-Time graphs means what?
The object is either accelerating or de-accelerating.
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The gradient on Velocity-Time graphs equals what?
Acceleration.
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Flat sections on Velocity-Time graphs mean what?
The object is at a steady speed.
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The steeper the graph on Velocity-Time graphs mean what?
The object's acceleration or de-acceleration is greater.
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Uphill sections on Velocity-Time graphs mean what?
Acceleration.
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Downhill sections on Velocity-Time graphs mean what?
De-acceleration.
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The area under any section on Velocity-Time graphs mean what?
The distance travelled by the object - in that time interval.
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A curve on Velocity-Time graphs mean what?
The object is changing it's acceleration.
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Two important effects of gravity are?
1) Gives everything weight. 2) On Earth, it gives everything the acceleration of 10m/s², towards the ground.
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Define Mass:
Mass is the amount of 'stuff' in an object (This will be the same anywhere in the universe).
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Define Weight:
Weight is mass when pulled by a gravitational force.
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What are the units for WEIGHT and MASS?
Weight is in newtons (N) as it'x a force & Mass is measured in kilograms (Kg) as it isn't a force.
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What is the resultant force on a object when it is stationary?
Zero.
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There is no resultant force on a moving object. Describe the velocity:
The object is moving at a constant velocity.
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There is a non-zerp resultant force on a object. Describe the movement of the object:
The object is either accelerating or de-accelerating in the direction of the force.
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Describe the forces, when two objects interact:
The forces they exert on each other are equal and opposite.
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If an object has a force acting on it, what force will always make the object slow down and stop?
Friction.
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What are the names of the resistive forces?
Resistance or Drag (Air or Liquid).
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When speed increases, what happens to the drag?
It also increases.
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What is the relation between the following: Braking Distance, Stopping Distance and Thinking Distance.
Thinking distance plus Braking Distance equals Stopping Distance.
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What factors affect thinking distance?
Tiredness, Drugs, Alcohol, Careless Attitude and Distractions.
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What factors affect braking distance?
The quality of brakes, the quality of tyres and the surface which is being driven on: Obstacles (Leafs) and Weather Conditions.
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What happens when a force moves an object through a distance?
Energy is transferred and work is done.
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When the height of an object is increased, what happens to it's Gravitational Potential Energy?
It also increases.
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What is the energy of Movement?
Kinetic Energy.
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Work Done to an Elastic Object is Stored as what?
Elastic Potential Energy.
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The extension of an elastic object is directly proportional to what?
It is proportional to the load or force applied.
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Power is the rate of what?
Energy transferred or Work Done, in seconds.
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What is the measurement units for Power?
Watts (W)
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What designs are put in place to increase the safety in a car crash?
Crumple Zones, Side Impact Bars, Seat Belts and Air Bags.
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What are the units for Momentum?
Kg m/s
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## Other cards in this set

### Card 2

#### Front

A flat line on Distance-Time graphs means what?

#### Back

The object is at a stationary position.

### Card 3

#### Front

A straight line going uphill or downhill on Distance-Time graphs means what?

### Card 4

#### Front

The steeper the line on Distance-Time graphs means what?

### Card 5

#### Front

Downhill sections on Distance-Time graphs means what?

#### Back

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Great for P2 AQA Additional Science.

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