Physics Edexcel IGCSE - Paper 1 exam with answers

Physics Edexcel IGCSE - Paper 1 exam |\ |\ |\ |\ |\ |\ |\




with answers |\




Practical: Investigate the motion of everyday objects such as toy
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cars or tennis balls.
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* mark the start and end positions for the distance
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* use a metre rule to measure the distance
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* line up front of car with start point, release and start timer
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move eyes to end point
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* stop timer when front of car passes end point
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* repeating twice and calulate an average
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* make sure car starts from stationary
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calculate average speed using : average speed = distance
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travelled/ time taken |\ |\




What does the gradient equal in a velocity time graph?
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acceleration




How would you determine the distance travellled on a velocity-
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time graph? |\




The area under the graph
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,What may happen when a force acts on a body?
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It may change the velocity - the speed, direction or both.
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How may a force effect the shape of a body?
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Stretching, squishing or twisting it |\ |\ |\ |\




Name different types of forces
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Gravitational, weight, friction, electrostatic, air resistance (drag),
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tension (force in a spring), up thrust, lift, thrust
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Define a scalar |\ |\




Quantities with only magnitude |\ |\ |\




Define a vector |\ |\




Quantities with magnitude and direction |\ |\ |\ |\




Is force a scalar or a vector?
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A vector, as is has amagnitude measured in (N) but it also has a
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direction, a push or a pull, up, down, left or right.
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,How do you calculate the resultant force of forces that act along
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a line?
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Forces along a line can combine by addition.
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What causes friction?
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Friction is caused by surfaces rubbing. The force always acts in
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the opposite direction to motion.
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What does stopping distance = ?
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Thinking distance + braking distance
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What factors affect a vehicle's thinking distance?
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Tiredness
Alcohol
speed of the car |\ |\ |\

, What factors affect a vehicle's braking distance?
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Road conditions
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Tyre conditions
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Brake conditions |\




speed of the car |\ |\ |\




mass of the car |\ |\ |\




Describe the forces acting on a falling object.
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- Initially the only force is weight as drag is proportional to
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velocity.
- So the object accelerates downwards.
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- As it accelerates the drag increases as well.
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- There is a smaller resultant force downwards so a smaller
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acceleration.
- The object reaches a speed where the drag is equal to the
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weight, terminal velocity. |\ |\




Practical: Investigate how extension varies with applied force for
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helical springs, metal wires and rubber bands
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- Set up your apparatus as shown in the
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-Measure the length of your spring without any hanging masses.
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