Neco 2021 Physics Question 5

Practice essay / theory question 5 from the 2021 Neco Physics examination. This question covers Work, Energy, Power, Friction, Inclined Plane .

Neco 2021 Physics Essay / Theory

Topics: Work Energy Power Friction Inclined Plane

Question 5 NECO • 2021 • PHYSICS • essay

A 2.0 kg block is released from rest at the top of a smooth inclined plane that is 5.0 m high and makes an angle of 30° with the horizontal. The plane is rough, having a coefficient of kinetic friction μk = 0.20. The block slides down the plane and reaches the bottom in 4.0 s.

( a )

Calculate the length of the inclined plane.

( b )

Determine (i) the work done by gravity, (ii) the work done by friction, and (iii) the net work done on the block during its descent.

( c )

Using the net work, calculate the speed of the block at the bottom of the plane.

( d )

If the block takes 4.0 s to travel down the plane, find the average power developed during the motion.

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This is Neco 2021 Physics Question 5. It is one of the essay questions from the 2021 Neco Physics examination.

The question covers Work, Energy, Power, Friction, Inclined Plane .

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