School Olympiads - National Science Olympiad (NSO)

Force, Pressure, Friction & Sound Waves question bank (Class 7 & 8 - Applied Physics, Chemistry & Biology)

Practice 4 free School Olympiads - National Science Olympiad (NSO) Class 7 & 8 - Applied Physics, Chemistry & Biology - Force, Pressure, Friction & Sound Waves questions with answers and step-by-step solutions.

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Q1.

A wooden block of mass $4\text{ kg}$ rests on a table. The contact area of its base is $0.02\text{ m}^2$. Taking $g = 10\text{ m/s}^2$, what is the pressure exerted by the block on the table?

(A)

{'key': 'A', 'text': '200 Pa'}

(B)

{'key': 'B', 'text': '800 Pa'}

(C)

{'key': 'C', 'text': '2000 Pa'}

(D)

{'key': 'D', 'text': '4000 Pa'}

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Q2.

A body of mass $12\text{ kg}$ moves under a constant force of $70\text{ N}$ in a laboratory experiment on Force, Pressure, Friction & Sound Waves. What is the acceleration produced in $\text{m/s}^2$?

(A)

{'key': 'A', 'text': '5 m/s²'}

(B)

{'key': 'B', 'text': '10 m/s²'}

(C)

{'key': 'C', 'text': '8 m/s²'}

(D)

{'key': 'D', 'text': '3 m/s²'}

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