Edexcel IGCSE Physics exam with answers

Edexcel IGCSE Physics exam with |\ |\ |\ |\ |\




answers

average speed = - CORRECT ANSWERS ✔✔distance / time
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v=d/t
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Standard Unit for mass (m) - CORRECT ANSWERS ✔✔kilogram
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(kg)


Standard Unit for distance (d) or displacement (s) - CORRECT
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ANSWERS ✔✔metre |\ |\




(m)


Standard Unit for speed (s) or velocity (v) - CORRECT ANSWERS
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✔✔metre/second
(m/s)


Standard Unit for acceleration (a) - CORRECT ANSWERS
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✔✔metre/second²
(m/s²)


Standard Unit for Force (F) - CORRECT ANSWERS ✔✔Newton
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(N)

,Standard Unit for time (t) - CORRECT ANSWERS ✔✔Second
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(s)


Standard Unit for gravitational field strength (g) - CORRECT
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ANSWERS ✔✔Newton/kilogram |\




(N/kg)


Standard Unit for moment |\ |\ |\




(Paper 2 Only) - CORRECT ANSWERS ✔✔Newton metre
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(Nm)


Standard Unit for momentum (p) |\ |\ |\ |\




(Paper 2 Only) - CORRECT ANSWERS ✔✔kilogram metre/second
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(kg m/s)
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What does the gradient of a distance-time graph represent? -
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CORRECT ANSWERS ✔✔Gradient or the slope gives the speed.
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Flat line means stationary, straight line means constant speed,
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curved line means accelerating
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Describe how to investigate the motion of a toy car - CORRECT
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ANSWERS ✔✔- Set a ramp up so that the top of it is a certain
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height, h, above the desk, and the other end is fixed in place on
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the desk.
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- Measure the distance the toy car will travel down the ramp
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using a metre ruler.
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,- Measure the time taken for the toy car to roll down the ramp
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using a stop watch. |\ |\ |\




- As it is difficult to start and stop the watch at exactly the right
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time, the experiment is repeated five times so an average time
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can be calculated.
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- Divide the distance by the average time to calculate the
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average speed of the car. |\ |\ |\ |\




- To improve the accuracy of the experiment, light gates
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connected to electronic timers could be used as human reaction |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


times will no longer affect the results. We still take multiple
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readings as the car may not have been released in exactly the
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same way each time. |\ |\ |\




- An electronic timer that reads to more decimal places will give
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the answer to a greater level of precision.
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Acceleration = - CORRECT ANSWERS ✔✔Change in velocity/time |\ |\ |\ |\ |\ |\ |\ |\


taken
a = (v-u) / t
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What does the gradient of a velocity-time graph represent?
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What does the area underneath the line represent? - CORRECT
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ANSWERS ✔✔gradient = acceleration |\ |\ |\ |\




flat line = constant velocity
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straight lines = constant acceleration (changing velocity)
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area under graph = distance travelled
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(final speed)² = - CORRECT ANSWERS ✔✔(initial speed)² + (2 x
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acceleration x distance) |\ |\

, v² = u² + (2 x a x s)
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(This equation is given to you)
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A force can change an objects.... - CORRECT ANSWERS ✔✔-
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speed
- shape
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- direction
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Types of force.... - CORRECT ANSWERS ✔✔Gravitational (Weight)
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Electrostatic
Magnetic
Friction
Air Resistance (Drag)
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Upthrust (from fluids) |\ |\




Reaction (from solids) |\ |\




Engine force |\




(and more...) |\




What is Scalar? |\ |\




Give some examples - CORRECT ANSWERS ✔✔A measurement
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with just magnitude. |\ |\




Time, distance, temperature, mass, energy, charge, area,
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volume, frequency etc. |\ |\




What is a Vector? |\ |\ |\