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A level Physics Paper 1- Questions and Answers Already Passed
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A level Physics Paper 1- Questions and Answers Already Passed
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A level Physics Paper 1- Questions and Answers AlreadyPassed
Centre of gravity Correct Ans-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 Correct Ans-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 Correct Ans-F=ma
,A level Physics Paper 1- Questions and Answers Already
Passed
Newton's Third Law Correct Ans-For every action there is an equal and opposite reaction
Kinematics Correct Ans-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 Correct Ans-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.
,A level Physics Paper 1- Questions and Answers Already
Passed
projectile motion Correct Ans-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 Correct Ans-The energy that an object has by virtue of it's
position in a gravitational field.
= mgh
Kinetic energy Correct Ans-the energy an object has by virtue of its movement
= ½mv²
Transfer of energy Correct Ans-When an object falls, gravitational potential energy is
converted into kinetic energy. This happens as energy must be conserved.
, A level Physics Paper 1- Questions and Answers Already
Passed
For this specific conversion, you don't even need to know the mass of the object as
mgh=½mv² and therefore the Ms cancel out, leaving you with gh=½v²
In this conversion you assume that air resistance can be ignored
Work done Correct Ans-force × distance moved in the direction of the force
It is measured in Joules. This is the same as energy transferred
Work done at angles Correct Ans-In order to find out work done, you need to resolve the
forces to find the component of a force that is acting in the direction of motion.
Power Correct Ans-= energy transferred/time taken
Measured in Watts
Efficiency Correct Ans-=useful energy out/total energy in
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