CIE iGCSE Co-Ordinated Science P1.5.1 Effects of forces Exam Style Questions Paper 1
Question
Which statement applies to a system in equilibrium?
A. There is a resultant force and there is a resultant turning effect on the system.
B. There is a resultant force but there is no resultant turning effect on the system.
C. There is no resultant force but there is a resultant turning effect on the system.
D. There is no resultant force and there is no resultant turning effect on the system.
▶️Answer/Explanation
Answer: D
Explanation: In equilibrium, there is no resultant force and no resultant turning effect (moment) acting on the system.
Question
The diagram shows a large force of magnitude P and a small force of magnitude Q acting on a box.
Which expression gives the magnitude of the resultant force on the box?
A P + Q
B P – Q
C P × Q
D P ÷ Q
▶️Answer/Explanation
Answer: B. P – Q
Explanation: The resultant force is the difference between the two forces since they are acting in opposite directions. Therefore, the magnitude of the resultant force is P – Q.
Question
The diagrams show the two forces acting on four objects P, Q, R and S.
Which two objects experience equal resultant forces acting in the same direction?
A P and Q B P and R C Q and R D Q and S
▶️Answer/Explanation
Ans :A
Question
The diagrams show the only forces acting on four moving objects.
Which object is travelling at constant speed?
▶️Answer/Explanation
$Ans : D$