Forces, Movement, Shape, and Momentum
4 marks · EasyA trolley of mass 0.80 kg is pushed by a constant force of 2.0 N along a smooth, straight track.
Calculate the acceleration of the trolley.
Is the acceleration a vector or a scalar quantity? Explain your answer.
State the unit for force.
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
(a) 2.5 m/s^2
(b) Acceleration is a vector quantity, because it has both magnitude and direction.
(c) Newton (N)
Common mistakes: Dividing 0.8 by 2; Calling newton 'kg m/s'
Show mark scheme and worked solution
Marking points
M1 (a) · 1 mark · Uses F = m × a, rearranged for a = F / m.
A1 (a) · 1 mark · Correct calculation and answer: 2.5 m/s^2.
B1 (b) · 1 mark · States acceleration is a vector and gives valid reason (direction and size).
B1 (c) · 1 mark · States the correct unit for force: newton (N).
Worked solution
(b) Acceleration is a vector quantity because it has both size and direction.
(c) The unit for force is the newton (N).