AQA GCSE Combined Science Trilogy · 8464

Gravity

What you need to know

Explain that weight is the force acting on an object due to gravity, caused by the gravitational field around the Earth.
Understand that the weight of an object depends on the gravitational field strength at its location.
Calculate the weight of an object using the equation:

$W = m g$

Identify the standard units for weight (newtons, N), mass (kilograms, kg), and gravitational field strength (newtons per kilogram, N/kg).
Describe the 'centre of mass' as the single theoretical point where an object's weight can be considered to act.
Explain that the weight and mass of an object are directly proportional, and accurately use the symbol for proportionality ( $\propto$ ).
Describe how weight is measured using a calibrated spring-balance or newtonmeter.

AQA GCSE Combined Science Trilogy · 8464

Explain that weight is the force acting on an object due to gravity, caused by the gravitational field around the Earth.
Understand that the weight of an object depends on the gravitational field strength at its location.
Calculate the weight of an object using the equation:

$W = m g$

Identify the standard units for weight (newtons, N), mass (kilograms, kg), and gravitational field strength (newtons per kilogram, N/kg).
Describe the 'centre of mass' as the single theoretical point where an object's weight can be considered to act.
Explain that the weight and mass of an object are directly proportional, and accurately use the symbol for proportionality ( $\propto$ ).
Describe how weight is measured using a calibrated spring-balance or newtonmeter.