waec model questions vol1 2021 physics
Objective • Question 4
Question 4
WAEC_MODEL_QUESTIONS_VOL1
•
2021
A 5.0 kg block rests on a horizontal rough surface (μ_s=0.40, μ_k=0.30). It is attached to a 3.0 kg hanging mass by a light inextensible string over a smooth pulley. Determine (a) the acceleration of the system and (b) the tension in the string. (Take g=9.8 m s⁻².)
Answer Options
A.
a = 2.30 m\/s²; T = 20.0 N
Correct Answer
B.
a = 1.84 m/s²; T = 23.9 N
C.
a = 2.10 m\/s²; T = 21.5 N
D.
a = 1.55 m\/s²; T = 26.3 N
Correct Answer
B
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