GCSE AQA Combined Physics Paper2 RPAs

RPA6 Investigating the relationship between force and extension for a spring

How do you vary the force acting on the spring?

• Hang weights on a weight hanger on the spring

• Pull the spring with a newton gauge

• Use a pulley and string, with masses hanging down

• Use a top-pan balance to weigh the spring

RPA6 Investigating the relationship between force and extension for a spring

How do you measure the spring's extension?

• Use a ruler, with the bottom of the spring on the zero cm mark

• Measure the initial length with a ruler. Measure the stretched length. Calculate the difference

• Multiply the spring constant by the force

• Divide the work done by the Force

RPA6 Investigating the relationship between force and extension for a spring

Which of these is NOT a safety control measure for this investigation

• Place the masses above the clamp stand base to increase stability

• Wear safety goggles

• Make sure not to over-stretch the spring

• Make sure the room is well-ventilated

RPA6 Investigating the relationship between force and extension for a spring

What kind of error is caused by not measuring the spring length standing up, rather than at eye-level?

• A zero error

• A random error

• A parallax error

• A systematic error

RPA6 Investigating the relationship between force and extension for a spring

What type of graph should be plotted for your results?

• A pie chart

• A bar chart

• A scatter graph

• A histogram

RPA6 Investigating the relationship between force and extension for a spring

What pattern should a graph of your results show?

• A negative correlation

• A positive correlation

• A non-linear pattern

• A straight line passing through the origin

RPA6 Investigating the relationship between force and extension for a spring

The relationship between force and length for a spring* is...

• Force is inversely proportional to extension

• Force is directly proportional to extension

• Force = extension

• Force x extension = constant

RPA6 Investigating the relationship between force and extension for a spring

• * Note. Force is only directly proportional to extension as long as the limit of (a)   is not exceeded

RPA6 Investigating the relationship between force and extension for a spring

If a force of 200N causes a spring to extend 10cm, the spring constant = ?

• 20 N/m
• 1000 N/m
• 2000 N/m
• 500 N/m

RPA7 investigating the effect of varying the force on the acceleration of an object of constant mass

How was a force applied to the "trolley" ?

• By pulling it with a newton-gauge

• Pulling it with a string attached to masses

• Pulling the trolley with an electromagnet

• Pushing the trolley with your hand very carefully