Edexcel IGCSE Physics-Exam Study Guide
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average speed = ------- ✔ CORRECT ANSWER ✓✓distance / time
v=d/t
Standard Unit for mass (m) ------- ✔ CORRECT ANSWER ✓✓kilogram
(kg)
Standard Unit for distance (d) or displacement (s) ------- ✔ CORRECT ANSWER ✓✓metre
(m)
Standard Unit for speed (s) or velocity (v) ------- ✔ CORRECT ANSWER ✓✓metre/second
(m/s)
Standard Unit for acceleration (a) ------- ✔ CORRECT ANSWER ✓✓metre/second²
(m/s²)
Standard Unit for Force (F) ------- ✔ CORRECT ANSWER ✓✓Newton
(N)
Standard Unit for time (t) ------- ✔ CORRECT ANSWER ✓✓Second
,(s)
Standard Unit for gravitational field strength (g) ------- ✔ CORRECT ANSWER
✓✓Newton/kilogram
(N/kg)
Standard Unit for moment
(Paper 2 Only) ------- ✔ CORRECT ANSWER ✓✓Newton metre
(Nm)
Standard Unit for momentum (p)
(Paper 2 Only) ------- ✔ CORRECT ANSWER ✓✓kilogram metre/second
(kg m/s)
What does the gradient of a distance-time graph represent? ------- ✔ CORRECT ANSWER
✓✓Gradient or the slope gives the speed.
Flat line means stationary, straight line means constant speed, curved line means accelerating
Describe how to investigate the motion of a toy car ------- ✔ CORRECT ANSWER ✓✓- Set a ramp
up so that the top of it is a certain height, h, above the desk, and the other end is fixed in place
on the desk.
- Measure the distance the toy car will travel down the ramp using a metre ruler.
- Measure the time taken for the toy car to roll down the ramp using a stop watch.
- As it is difficult to start and stop the watch at exactly the right time, the experiment is repeated
five times so an average time can be calculated.
- Divide the distance by the average time to calculate the average speed of the car.
, - To improve the accuracy of the experiment, light gates connected to electronic timers could be
used as human reaction times will no longer affect the results. We still take multiple readings as
the car may not have been released in exactly the same way each time.
- An electronic timer that reads to more decimal places will give the answer to a greater level of
precision.
Acceleration = ------- ✔ CORRECT ANSWER ✓✓Change in velocity/time taken
a = (v-u) / t
What does the gradient of a velocity-time graph represent?
What does the area underneath the line represent? ------- ✔ CORRECT ANSWER ✓✓gradient =
acceleration
flat line = constant velocity
straight lines = constant acceleration (changing velocity)
area under graph = distance travelled
(final speed)² = ------- ✔ CORRECT ANSWER ✓✓(initial speed)² + (2 x acceleration x distance)
v² = u² + (2 x a x s)
(This equation is given to you)
A force can change an objects.... ------- ✔ CORRECT ANSWER ✓✓- speed
- shape
- direction
Types of force.... ------- ✔ CORRECT ANSWER ✓✓Gravitational (Weight)
Electrostatic
Magnetic
with Verified Answers | Guaranteed
Success
average speed = ------- ✔ CORRECT ANSWER ✓✓distance / time
v=d/t
Standard Unit for mass (m) ------- ✔ CORRECT ANSWER ✓✓kilogram
(kg)
Standard Unit for distance (d) or displacement (s) ------- ✔ CORRECT ANSWER ✓✓metre
(m)
Standard Unit for speed (s) or velocity (v) ------- ✔ CORRECT ANSWER ✓✓metre/second
(m/s)
Standard Unit for acceleration (a) ------- ✔ CORRECT ANSWER ✓✓metre/second²
(m/s²)
Standard Unit for Force (F) ------- ✔ CORRECT ANSWER ✓✓Newton
(N)
Standard Unit for time (t) ------- ✔ CORRECT ANSWER ✓✓Second
,(s)
Standard Unit for gravitational field strength (g) ------- ✔ CORRECT ANSWER
✓✓Newton/kilogram
(N/kg)
Standard Unit for moment
(Paper 2 Only) ------- ✔ CORRECT ANSWER ✓✓Newton metre
(Nm)
Standard Unit for momentum (p)
(Paper 2 Only) ------- ✔ CORRECT ANSWER ✓✓kilogram metre/second
(kg m/s)
What does the gradient of a distance-time graph represent? ------- ✔ CORRECT ANSWER
✓✓Gradient or the slope gives the speed.
Flat line means stationary, straight line means constant speed, curved line means accelerating
Describe how to investigate the motion of a toy car ------- ✔ CORRECT ANSWER ✓✓- Set a ramp
up so that the top of it is a certain height, h, above the desk, and the other end is fixed in place
on the desk.
- Measure the distance the toy car will travel down the ramp using a metre ruler.
- Measure the time taken for the toy car to roll down the ramp using a stop watch.
- As it is difficult to start and stop the watch at exactly the right time, the experiment is repeated
five times so an average time can be calculated.
- Divide the distance by the average time to calculate the average speed of the car.
, - To improve the accuracy of the experiment, light gates connected to electronic timers could be
used as human reaction times will no longer affect the results. We still take multiple readings as
the car may not have been released in exactly the same way each time.
- An electronic timer that reads to more decimal places will give the answer to a greater level of
precision.
Acceleration = ------- ✔ CORRECT ANSWER ✓✓Change in velocity/time taken
a = (v-u) / t
What does the gradient of a velocity-time graph represent?
What does the area underneath the line represent? ------- ✔ CORRECT ANSWER ✓✓gradient =
acceleration
flat line = constant velocity
straight lines = constant acceleration (changing velocity)
area under graph = distance travelled
(final speed)² = ------- ✔ CORRECT ANSWER ✓✓(initial speed)² + (2 x acceleration x distance)
v² = u² + (2 x a x s)
(This equation is given to you)
A force can change an objects.... ------- ✔ CORRECT ANSWER ✓✓- speed
- shape
- direction
Types of force.... ------- ✔ CORRECT ANSWER ✓✓Gravitational (Weight)
Electrostatic
Magnetic
