Neco Model Questions Vol1 2019 Physics Question 47

Practice objective / multiple choice question 47 from the 2019 Neco Model Questions Vol1 Physics examination.

Neco Model Questions Vol1 2019 Physics Objective / Multiple Choice Medium Difficulty
Question 47 NECO_MODEL_QUESTIONS_VOL1 • 2019 • PHYSICS • objective

A 5 kg block starts from rest at the top of a smooth incline 6.0 m long that makes an angle of \(30^{\circ}\) with the horizontal. The coefficient of kinetic friction between the block and the incline is 0.20. At the bottom of the incline the block compresses a horizontal spring of spring constant \(k = 800\ \text{N\,m}^{-1}\) and comes to rest after compressing the spring. (a) Calculate the maximum compression of the spring. (b) Assuming the compression occurs uniformly over a time interval of 0.50 s, determine the average power delivered by the block to the spring during this interval.

Answer Options

A. Maximum compression \(x \approx 0.60\,\text{m}\); average power \(\approx 2.3\times10^{2}\,\text{W}\).
B. Maximum compression \(x \approx 0.35\,\text{m}\); average power \(\approx 1.5\times10^{2}\,\text{W}\).
Correct Answer C. Maximum compression \(x \approx 0.49\,\text{m}\); average power \(\approx 1.92\times10^{2}\,\text{W}\).
D. Maximum compression \(x \approx 0.42\,\text{m}\); average power \(\approx 1.8\times10^{2}\,\text{W}\).
Correct Answer
C
Correct Option:
Maximum compression \(x \approx 0.49\,\text{m}\); average power \(\approx 1.92\times10^{2}\,\text{W}\).

About This Question

This is Neco Model Questions Vol1 2019 Physics Question 47. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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