FORCE, MASS AND ACCELERATION
2 marks · EasyExplain what will happen to the acceleration of a suitcase if a larger force is applied to it while its mass stays the same. Use the relationship F = m × a in your answer.
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Must show: States that acceleration increases when force increases with constant mass, Refers to proportional relationship from F = m × a
Also accept: Acceleration increases; Direct proportionality explained
Common mistakes: Saying acceleration stays the same; Saying mass changes with force
Show mark scheme and worked solution
Marking points
B1 · 1 mark · States that the acceleration increases as force increases (with constant mass).
B2 · 1 mark · States or uses F = m × a or explains directly proportional relationship between force and acceleration.
Worked solution
If the mass stays the same, increasing the force will increase the acceleration.
The relationship from F = m × a shows acceleration and force are directly proportional (a = F/m), so a bigger force causes a bigger acceleration if mass doesn't change.