Neco 2022 Physics Question 15

Practice objective / multiple choice question 15 from the 2022 Neco Physics examination.

Neco 2022 Physics Objective / Multiple Choice Medium Difficulty

Question 15 NECO • 2022 • PHYSICS • objective

A crate of weight \(800\ \text{N}\) is pulled up an inclined plane of length \(5.0\ \text{m}\) and height \(2.0\ \text{m}\) at constant speed by a force of magnitude \(500\ \text{N}\) applied parallel to the plane.\n\n(a) Calculate the coefficient of kinetic friction \(\mu_{k}\) between the crate and the plane.\n\n(b) Determine the mechanical efficiency of the inclined plane, defined as the ratio of useful output work (increase in gravitational potential energy) to the input work done by the applied force.

A. μ = 0.30, η = 70%

B. μ = 0.20, η = 55%

C. μ = 0.25, η = 75%

Correct Answer D. μ = 0.25, η = 64%

Correct Answer

Correct Option:

μ = 0.25, η = 64%

This is Neco 2022 Physics Question 15. It is one of the objective questions from the 2022 Neco Physics examination.

Difficulty level: Medium .

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