When a body is slightly titled, it is found that its centre of gravity s slightly raised. What is the state of equilibrium of the body?
A. unstable B. stable C. neutal D. cannot be detrmined Correct Answer: Option B B. stableAn object is dropped from the top of a tower. If it takes 4s for it to reach the ground, calculate the height of the tower.(g = 10 ms‾², ignore air resistance)
A. 20m B. 40m C. 80m D. 160m Correct Answer: Option C C. 80m Explanation H = ½gt² ½×10×4²=80Which of the following substances is the most volatile at room temperature?
A. water B. diesel C. petrol D. kerosine Correct Answer: Option C C. petrolA metal ball of weight W falls through a column of glycerine of viscosity V. If the ball experiences an upthrust U and terminal velocity is attained, then?
A. W > U + V B. W = U + V C. W = U – V D. W < U + V Correct Answer: Option B B. W = U + VA block of wood of density 0.6 gcm‾³, weighing 3.06N in air, floats freely in a liquid of density 0.9 gcm‾³. Calculate volume of the portion immersed (g = 10ms‾²)
A. 510cm³ B. 340cm³ C. 254cm³ D. 170cm³ Correct Answer: Option B B. 340cm³ Explanation V = M/D = 3.06/10 × 100/00.9 = 340Products
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