waec model questions vol1 2019 physics
Objective • Question 25
Question 25
WAEC_MODEL_QUESTIONS_VOL1
•
2019
Block A (mass \(4\ \text{kg}\)) rests on a rough horizontal table with a coefficient of kinetic friction \(\mu_k = 0.20\). Block B (mass \(6\ \text{kg}\)) lies on a smooth incline of \(30^{\circ}\) that meets the table at a smooth pulley. The two blocks are connected by a light inextensible string over the pulley. A horizontal force \(F\) is applied to block A to the right. Determine the minimum magnitude of \(F\) required to start moving the system (i.e., to overcome friction on block A). Give your answer in newtons to one decimal place.
Answer Options
Correct Answer
A.
37.2
B.
31.5
C.
28.9
D.
42.0
Correct Answer
A
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