FORCES AND SHAPE
3 marks · EasyA child is pulling a toy car along a flat table. The child pulls the car with a force of 2 N to the right. Friction between the table and the car is 1.5 N to the left.
State the direction of the resultant force on the car.
Calculate the size of the resultant force on the car.
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) to the right
(b) 0.5 N
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · 1 mark for correct direction ('to the right')
M1 (b) · 1 mark · method: subtracting the two forces (2 N - 1.5 N)
A1 (b) · 1 mark · accuracy: correct final answer (0.5 N) (follow-through)
Worked solution
a) The resultant force is to the right. b) Resultant force = 2 N (right) - 1.5 N (left) = 0.5 N (to the right).