Neco Model Questions Vol1 2025 Physics Question 3

Practice objective / multiple choice question 3 from the 2025 Neco Model Questions Vol1 Physics examination.

Neco Model Questions Vol1 2025 Physics Objective / Multiple Choice Medium Difficulty
Question 3 NECO_MODEL_QUESTIONS_VOL1 • 2025 • PHYSICS • objective

A \(5.0\ \text{kg}\) block is released from rest at the top of a \(30^{\circ}\) incline that is \(8.0\ \text{m}\) long. The coefficient of kinetic friction between the block and the incline is \(0.15\). (a) Find the speed of the block at the bottom of the incline. (b) Determine the average power delivered by the block's weight during the descent. (c) If a motor raises the block back to the top at constant speed in \(4.0\ \text{s}\), what power must the motor supply? Give all answers to three significant figures.

Answer Options

A. 6.9 m/s; 1.05×10^2 W; 6.50×10^1 W
B. 7.2 m/s; 9.00×10^1 W; 5.80×10^1 W
Correct Answer C. 7.6 m/s; 9.33×10^1 W; 6.18×10^1 W
D. 8.1 m/s; 9.00×10^1 W; 5.90×10^1 W
Correct Answer
C
Correct Option:
7.6 m/s; 9.33×10^1 W; 6.18×10^1 W

About This Question

This is Neco Model Questions Vol1 2025 Physics Question 3. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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