FORCE, MASS AND ACCELERATION
3 marks · NormalA boat of mass 600 kg is acted on by an unbalanced force of 1,800 N as it speeds up to leave a dock.
Calculate the acceleration of the boat. Give your answer in m/s to 2 significant figures.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
3.0 m/s^2 (±0.05)
Also accept: 3.00 m/s^2; 3 m/s^2
Common mistakes: Using mass as grams; Missing units
Show mark scheme and worked solution
Marking points
M1 · 1 mark · States or uses F = m × a, or rearranges to a = F/m
M2 · 1 mark · Substitutes correct values into the formula (follow-through)
A1 · 1 mark · Evaluates to 3.0 m/s^2 (accept 3.00 m/s^2); correct units (follow-through)
Worked solution
We use the equation F = m × a.