Question 1
A body weighing l00N in air is found to weigh 80N when fully immersed in a certain fluid. Account for the difference in the two weights?
Answer
The difference is due to the upthrust force offered by the fluid
Question 2
State how the pressure of a fixed mass of gas can be increased at constant temperature
Answer
By decreasing the volume of the gas container.
Question 3
The figure below shows a U – tube containing two liquids L1 and L2 of densities 0.5g/cm3 and 0.8g/cm3 respectively floating on a water surface. If the system is in equilibrium, determine the ratio h1: h2
Answer
Question 4
A uniform metre rule pivoted at its 15cm mark is balanced by a 200 g mass suspended at the 5 cm mark. Determine the weight of the metre rule.
Answer
Question 5
The Figure below shows a pith ball at the bottom of a bottle container.
State and explain what would happen if air is blown over the mouth of the container.
Answer
The pith ball is lifted upwards. This is because the air at high speed creates a low pressure region at the mouth of the bottle which tends to suck/pull the ball upwards