Neco Model Questions Vol1 2019 Physics Question 3

Practice objective / multiple choice question 3 from the 2019 Neco Model Questions Vol1 Physics examination.

Neco Model Questions Vol1 2019 Physics Objective / Multiple Choice Medium Difficulty
Question 3 NECO_MODEL_QUESTIONS_VOL1 • 2019 • PHYSICS • objective

A machine consists of two meshing gears. Gear A (the driver) has 20 teeth and rotates at 1500 rpm. It drives gear B (the driven) which has 50 teeth and is fixed to a pulley of radius 0.10 m. The belt from this pulley drives a second pulley of radius 0.20 m that is attached to a drum lifting a 500‑kg mass at constant speed. The overall mechanical efficiency of the gear‑belt system is 70 %. (a) Determine the useful power delivered to the drum in kilowatts. (b) Find the tension difference (tight side minus slack side) in the belt in newtons.

Answer Options

A. Power ≈ 25.0 kW; tension difference ≈ 3.2×10³ N
Correct Answer B. Power ≈ 30.8 kW; tension difference ≈ 4.9×10³ N
C. Power ≈ 28.9 kW; tension difference ≈ 5.5×10³ N
D. Power ≈ 35.6 kW; tension difference ≈ 6.1×10³ N
Correct Answer
B
Correct Option:
Power ≈ 30.8 kW; tension difference ≈ 4.9×10³ N

About This Question

This is Neco Model Questions Vol1 2019 Physics Question 3. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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