A LEVEL 3 GCE PHYSICS UPDATED
COMPLETE QUESTIONS AND CORRECT
ANSWERS BUNDLED RESOURCE
●● Velocity
Answer: Is a vector and therefore has both direction and magnitude.
=displacement / time
●● Accelaration
Answer: =(v-u)/t
Where v is initial velocity and u is final velocity
●● Displacement time graph
Answer: upward slope - constant positive velocity
flat line - stationary
downward slope - negative constant velocity
It can often be easier to just draw a distance-time graph.
●● velocity-time graph
Answer:
,●● Acceleration-time graph
Answer: a graph describing motion of an object, with acceleration on the
vertical axis and time on the horizontal axis.
upward slope - increasing acceleration
flat line - constant acceleration
downward slope - decreasing acceleration
●● Adding vectors
Answer: Draw both vectors next to each other head to tail and then use
Pythagoras and/or trig to calculate the missing side of the triangle and
the angle.
Remember, in order to draw these correctly, you'll probably have to
move one of the vectors.
●● Moments
Answer: the turning, movement of a force.
=force x perpendicular distance from the pivot.
●● Principle of moments
Answer: For an object that is in equilibrium:
- the sum of the clockwise moments = the sum of the anticlockwise
moments
- There is no resultant force.
,●● Centre of gravity
Answer: The point where the entire weight of an object appears to act.
This is essentially the same thing as the centre of mass
This always lies along the line of symmetry. for a flat irregular object
hang it from different points and draw a line straight down. Where the
lines connect that's the centre of mass, because it will always hang
directly under a point of suspension.
For other irregular objects it can be found using moments.
●● Newton's First Law
Answer: An object at rest stays at rest and an object in motion stays in
motion with the same speed and in the same direction unless acted upon
by an unbalanced force.
●● Newton's Second Law
Answer: F=ma
●● Newton's Third Law
Answer: For every action there is an equal and opposite reaction
●● Kinematics
, Answer: s = displacement
u = initial velocity
v = final velocity
a = acceleration
t = time.
All of the equations apart from s = (u+v)/2 xt are given in the formula
book. Just use them.
●● Resolving vectors
Answer: A single diagonal vector can also be broken down into it's
horizontal and vertical components. The principle is the same as when
finding resultant vectors.
●● projectile motion
Answer: When objects are thrown up into the air or kicked off a cliff or
something similar, they move in a curved line.
By separating the horizontal and vertical components of this motion we
can calculate distances, times and velocities etc.
The vertical component just goes straight up and down and has
acceleration due to gravity.
●● gravitational potential energy
COMPLETE QUESTIONS AND CORRECT
ANSWERS BUNDLED RESOURCE
●● Velocity
Answer: Is a vector and therefore has both direction and magnitude.
=displacement / time
●● Accelaration
Answer: =(v-u)/t
Where v is initial velocity and u is final velocity
●● Displacement time graph
Answer: upward slope - constant positive velocity
flat line - stationary
downward slope - negative constant velocity
It can often be easier to just draw a distance-time graph.
●● velocity-time graph
Answer:
,●● Acceleration-time graph
Answer: a graph describing motion of an object, with acceleration on the
vertical axis and time on the horizontal axis.
upward slope - increasing acceleration
flat line - constant acceleration
downward slope - decreasing acceleration
●● Adding vectors
Answer: Draw both vectors next to each other head to tail and then use
Pythagoras and/or trig to calculate the missing side of the triangle and
the angle.
Remember, in order to draw these correctly, you'll probably have to
move one of the vectors.
●● Moments
Answer: the turning, movement of a force.
=force x perpendicular distance from the pivot.
●● Principle of moments
Answer: For an object that is in equilibrium:
- the sum of the clockwise moments = the sum of the anticlockwise
moments
- There is no resultant force.
,●● Centre of gravity
Answer: The point where the entire weight of an object appears to act.
This is essentially the same thing as the centre of mass
This always lies along the line of symmetry. for a flat irregular object
hang it from different points and draw a line straight down. Where the
lines connect that's the centre of mass, because it will always hang
directly under a point of suspension.
For other irregular objects it can be found using moments.
●● Newton's First Law
Answer: An object at rest stays at rest and an object in motion stays in
motion with the same speed and in the same direction unless acted upon
by an unbalanced force.
●● Newton's Second Law
Answer: F=ma
●● Newton's Third Law
Answer: For every action there is an equal and opposite reaction
●● Kinematics
, Answer: s = displacement
u = initial velocity
v = final velocity
a = acceleration
t = time.
All of the equations apart from s = (u+v)/2 xt are given in the formula
book. Just use them.
●● Resolving vectors
Answer: A single diagonal vector can also be broken down into it's
horizontal and vertical components. The principle is the same as when
finding resultant vectors.
●● projectile motion
Answer: When objects are thrown up into the air or kicked off a cliff or
something similar, they move in a curved line.
By separating the horizontal and vertical components of this motion we
can calculate distances, times and velocities etc.
The vertical component just goes straight up and down and has
acceleration due to gravity.
●● gravitational potential energy
