Neco Model Questions Vol1 2020 Physics Question 6

Practice objective / multiple choice question 6 from the 2020 Neco Model Questions Vol1 Physics examination.

Neco Model Questions Vol1 2020 Physics Objective / Multiple Choice Medium Difficulty
Question 6 NECO_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • objective

A 5.0 kg block is pulled up a rough incline that is 8.0 m long and makes an angle of \(30^{\circ}\) with the horizontal. The coefficient of kinetic friction between the block and the incline is \(0.20\). The block starts from rest and reaches the top with a speed of \(4.0\) m s\(^{-1}\). Determine (a) the magnitude of the constant pulling force required, and (b) the average power delivered by this force during the motion. Use \(g = 9.8\) m s\(^{-2}\).

Answer Options

A. Pulling force \approx 30 N; average power \approx 60 W
Correct Answer B. Pulling force \(\approx 38\) N; average power \(\approx 76\) W
C. Pulling force \approx 45 N; average power \approx 90 W
D. Pulling force \approx 50 N; average power \approx 100 W
Correct Answer
B
Correct Option:
Pulling force \(\approx 38\) N; average power \(\approx 76\) W

About This Question

This is Neco Model Questions Vol1 2020 Physics Question 6. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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