Edexcel IGCSE Physics Questions with Detailed
Verified Answers
average speed =
✓✓ distance / time
v=d/t
Standard Unit for mass (m)
✓✓ kilogram
(kg)
Standard Unit for distance (d) or displacement (s)
✓✓ metre
(m)
Standard Unit for speed (s) or velocity (v)
✓✓ metre/second
(m/s)
Standard Unit for acceleration (a)
✓✓ metre/second²
(m/s²)
,Standard Unit for Force (F)
✓✓ Newton
(N)
Standard Unit for time (t)
✓✓ Second
(s)
Standard Unit for gravitational field strength (g)
✓✓ Newton/kilogram
(N/kg)
Standard Unit for moment
(Paper 2 Only)
✓✓ Newton metre
(Nm)
Standard Unit for momentum (p)
(Paper 2 Only)
✓✓ kilogram metre/second
(kg m/s)
, What does the gradient of a distance-time graph
represent?
✓✓ 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
✓✓ - 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 =
✓✓ 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?
✓✓ gradient = acceleration
flat line = constant velocity
straight lines = constant acceleration (changing
velocity)
area under graph = distance travelled
(final speed)² =
✓✓ (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....
✓✓ - speed
- shape
- direction
Verified Answers
average speed =
✓✓ distance / time
v=d/t
Standard Unit for mass (m)
✓✓ kilogram
(kg)
Standard Unit for distance (d) or displacement (s)
✓✓ metre
(m)
Standard Unit for speed (s) or velocity (v)
✓✓ metre/second
(m/s)
Standard Unit for acceleration (a)
✓✓ metre/second²
(m/s²)
,Standard Unit for Force (F)
✓✓ Newton
(N)
Standard Unit for time (t)
✓✓ Second
(s)
Standard Unit for gravitational field strength (g)
✓✓ Newton/kilogram
(N/kg)
Standard Unit for moment
(Paper 2 Only)
✓✓ Newton metre
(Nm)
Standard Unit for momentum (p)
(Paper 2 Only)
✓✓ kilogram metre/second
(kg m/s)
, What does the gradient of a distance-time graph
represent?
✓✓ 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
✓✓ - 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 =
✓✓ 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?
✓✓ gradient = acceleration
flat line = constant velocity
straight lines = constant acceleration (changing
velocity)
area under graph = distance travelled
(final speed)² =
✓✓ (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....
✓✓ - speed
- shape
- direction
