Gce Model Questions Vol1 2018 Physics Question 19

Practice objective / multiple choice question 19 from the 2018 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2018 Physics Objective / Multiple Choice Medium Difficulty
Question 19 GCE_MODEL_QUESTIONS_VOL1 • 2018 • PHYSICS • objective

A block of mass \(2.0\ \text{kg}\) starts from rest at the top of a rough inclined plane that is \(5.0\ \text{m}\) long and makes an angle of \(30^{\circ}\) with the horizontal. The coefficient of kinetic friction between the block and the plane is \(\mu_{k}=0.15\). (a) Find the speed of the block when it reaches the bottom. (b) Determine the time taken to travel down the plane. (c) Compute the instantaneous power dissipated by friction at the instant the block reaches the bottom.

Answer Options

A. v = 5.80 m·s^{-1}, \; t = 1.70 s, \; P_{fric} = 14.5 W
B. v = 5.50 m·s^{-1}, \; t = 1.80 s, \; P_{fric} = 13.0 W
C. v = 6.50 m·s^{-1}, \; t = 1.50 s, \; P_{fric} = 17.0 W
Correct Answer D. v = 6.02 m·s^{-1}, \; t = 1.66 s, \; P_{fric} = 15.3 W
Correct Answer
D
Correct Option:
v = 6.02 m·s^{-1}, \; t = 1.66 s, \; P_{fric} = 15.3 W

About This Question

This is Gce Model Questions Vol1 2018 Physics Question 19. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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