Neco 2021 Physics Question 28

Practice objective / multiple choice question 28 from the 2021 Neco Physics examination.

Neco 2021 Physics Objective / Multiple Choice Medium Difficulty

Question 28 NECO • 2021 • PHYSICS • objective

A \(5\ \text{kg}\) block starts from rest and slides down a rough incline that is \(8\ \text{m}\) long and makes an angle of \(30^{\circ}\) with the horizontal. The coefficient of kinetic friction is \(0.20\). Determine (a) the speed of the block at the bottom of the incline, (b) the time taken to reach the bottom, and (c) the average power delivered by gravity during the motion. Use \(g=9.8\ \text{m\,s}^{-2}\).

A. v=8.0 m/s; t=2.0 s; P=95 W

Correct Answer B. v=7.2 m/s; t=2.24 s; P=88 W

C. v=6.5 m/s; t=2.5 s; P=78 W

D. v=6.9 m/s; t=2.3 s; P=85 W

Correct Answer

Correct Option:

v=7.2 m/s; t=2.24 s; P=88 W

This is Neco 2021 Physics Question 28. It is one of the objective questions from the 2021 Neco Physics examination.

Difficulty level: Medium .

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