Suppose three identical steel balls Q; R; and S are placed on an undulating ground as illustrated in the diagram above. Which of the balls is/are in neutral equilibrium?
A. S only B. Q only C. R only D. Q and S only Correct Answer: Option A = S only Explanation A system is in neutral equilibrium if its equilibrium is independent of displacements from its original position. A marble S on a flat horizontal surface is an...
The linear expansivity α; and cubic expansivity γ; of a material are related by the equation?
A. γ=a B. γ=3α C. γ=2a D. γ=1/3α Correct Answer: Option B – γ = 3α Explanation cubic and linear expansivity are related by this equation. γ=3α.
The length of a simple pendulum is increased by a factor of four. By what factor is its period increase?
A. 0.5π B. 2 C. 2π D. 4 Correct Answer: Option B = 2 Explanation The period of a simple pendulum is doubled, when its length is made four times.
The area under a force-time graph represents?
A. change in kinetic energy B. change in momentum C. change in work done D. change in internal energy Correct Answer: Option B = change in momentum Explanation It is a graph that represents the force that acts on a body in a certain amount of time. Force on the object...
From the principle of flotation; a body sinks in a fluid until it displace a quantity equal to its own?
A. density B. mass C. weight D. volume Correct Answer: Option C – weight Explanation Archimede’s Principle states that a body immersed in a fluid experiences an upthrust equal to the weight of the fluid displaced, and this is fundamental to the equilibrium...Products
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