AS LEVEL PHYSICS 9702 QUESTIONS
ANSWERS WITH SOLUTIONS 2024
Newtons first law - ANSWER An object will remain at rest or keep traveling at constant velocity unless it
is acted on by a resultant force
Newtons second law - ANSWER The resultant force acting on an object is equal to the rate of change of
its momentum
Newtons third law - ANSWER When two bodies interact, the forces they exert on each other are equal
and opposite.
Name the 7 base units - ANSWER meter, kilogram, second, ampere, kelvin, mole, candela
Systemmatic error - ANSWER an error in readings which is repeated throughout the experiment
Accuracy - ANSWER an accurate value of a measured quantity is one which is closer to the true value of
the quantity
Precision - ANSWER the smallest change in value that can be measured by an instrument or an operator
Random error - ANSWER Inaccuracies when taking measurements
What causes upthrust - ANSWER Upthrust arises from the pressure which a fluid exerts on an object.
When there is more pressure on lower surface than the upper surface.
What is a newton - ANSWER Force required to accelerate 1kg of mass by 1ms⁻²
weight on a slope - ANSWER w=mgsinθ
Define center gravity - ANSWER The point where all the weight of the object may be considered to act.
, Define moment - ANSWER Product of force and the perpendicular distance from the pivot in which the
force is acted upon
Define a couple - ANSWER Two parallel forces that are equal in magnitude, acting in an opposite
direction to create a turning effect but not causing the object to accelerate.
How to calculate torque of a couple - ANSWER One of the forces x perpendicular distance between the
forces
Conservation of energy - ANSWER Energy cannot be created or destroyed, it can only be converted from
one form another.
Define Watt - ANSWER The rate of transfer of energy of one joule per second
Conservation of momentum - ANSWER total momentum in a system before and after the collision will
remain constant unless acted on by an external force
Perfectly elastic collision - ANSWER -Both momentum and kinetic energy are conserved.
-Relative speeds before and after stay the same.
Inelastic collision - ANSWER Momentum is conserves however kinetic energy is not conserved because it
is lost due to deforming the two objects.
How to know if a material obeys Hooke's law - ANSWER If the extension produced in it is proportional to
the applied force.
Hooke's law equation - ANSWER F=kx
Elastic potential energy - ANSWER E = 0.5Fx E = 0.5kx²
ANSWERS WITH SOLUTIONS 2024
Newtons first law - ANSWER An object will remain at rest or keep traveling at constant velocity unless it
is acted on by a resultant force
Newtons second law - ANSWER The resultant force acting on an object is equal to the rate of change of
its momentum
Newtons third law - ANSWER When two bodies interact, the forces they exert on each other are equal
and opposite.
Name the 7 base units - ANSWER meter, kilogram, second, ampere, kelvin, mole, candela
Systemmatic error - ANSWER an error in readings which is repeated throughout the experiment
Accuracy - ANSWER an accurate value of a measured quantity is one which is closer to the true value of
the quantity
Precision - ANSWER the smallest change in value that can be measured by an instrument or an operator
Random error - ANSWER Inaccuracies when taking measurements
What causes upthrust - ANSWER Upthrust arises from the pressure which a fluid exerts on an object.
When there is more pressure on lower surface than the upper surface.
What is a newton - ANSWER Force required to accelerate 1kg of mass by 1ms⁻²
weight on a slope - ANSWER w=mgsinθ
Define center gravity - ANSWER The point where all the weight of the object may be considered to act.
, Define moment - ANSWER Product of force and the perpendicular distance from the pivot in which the
force is acted upon
Define a couple - ANSWER Two parallel forces that are equal in magnitude, acting in an opposite
direction to create a turning effect but not causing the object to accelerate.
How to calculate torque of a couple - ANSWER One of the forces x perpendicular distance between the
forces
Conservation of energy - ANSWER Energy cannot be created or destroyed, it can only be converted from
one form another.
Define Watt - ANSWER The rate of transfer of energy of one joule per second
Conservation of momentum - ANSWER total momentum in a system before and after the collision will
remain constant unless acted on by an external force
Perfectly elastic collision - ANSWER -Both momentum and kinetic energy are conserved.
-Relative speeds before and after stay the same.
Inelastic collision - ANSWER Momentum is conserves however kinetic energy is not conserved because it
is lost due to deforming the two objects.
How to know if a material obeys Hooke's law - ANSWER If the extension produced in it is proportional to
the applied force.
Hooke's law equation - ANSWER F=kx
Elastic potential energy - ANSWER E = 0.5Fx E = 0.5kx²
