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1. CONCISE Physics - Middle School - 8

CHAPTERS

1. Matter

2. Physical Quantities and Measurement

3. Force and Pressure

4. Energy

5. Light Energy

6. Heat Transfer

7. Sound

8. Electricity

EXERCISES

1. Objective Questions

2. Short/Long Answer Questions

3. Numericals

Q1) Find the moment of force of 20N about an axis of rotation at distance 0.5m from the force.

Q2) The moment of a force of 25N about a point is 2.5Nm. Find the perpendicular distance of force from that point.

Q3) A spanner of length 10 cm is used to open a nut by applying a minimum force of 5.0 N. Calculate the moment of force required.

Q4) A wheel of diameter 2 m can be rotated about an axis passing through its center by a moment of force equal to 2.0 N m. What minimum force must be applied on its rim?

Q5) A normal force of 200N acts on an area of 0.02m^2 . Find the pressure in pascal.

Q6) Find the thrust required to exert a pressure of 50000 pascals on an area of 0.05m^2 ?

Q7) Find the area of a body which experiences a pressure of 50000 Pa by a thrust of 100 N?

Q8) Calculate the pressure in pascal exerted by a force of 300N acting normally on an area of 30cm^2

Q9) How much thrust will be required to exert a pressure of 20,000 Pa on an area of 1cm^2.

Q10) The base of a container measures 15 cm \times^{ } 20 cm. It is placed on a table top. If the weight of the container is 60N, what is the pressure exerted by the container on the table top?

Q11) Calculate the pressure extended on a surface of 0.5m^2 by a thrust of 100 kgf.

Q12) A boy weighing 60 kgf stands on a platform of dimensions 2.5 cm \times 0.5 cm. What pressure in pascal does he exert?

Q13) Figure shows a brick of weight 2kgf and dimensions 20 cm \times 10 cm \times 5 cm placed in three different positions on the ground. Find the pressure exerted by the brick in each case.

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Physics

CONCISE Physics - Middle School - 8

Matter

Physical Quantities and Measurement

Force and Pressure

Energy

Light Energy

Heat Transfer

Sound

Electricity

Objective Questions

Short/Long Answer Questions

Numericals

Lido

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Race To Space

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