We know that the pressure of water increases with depth. Then, which of the following shows the most possible shape of a dam?
Important Questions on Force and Pressure
Three identical balls are taken at three different places P, Q and R on the earth as shown in the diagram. When the balls are dropped, gravity makes them fall. Which of the following diagrams best shows the directions in which the balls will fall at P, Q and R?
Lorna and Kiran (who weigh the same) went to their school's annual day wearing shoes as shown here. Whose shoes would make a deeper impression in the wet, sandy ground there?
Lorna's shoes Kiran's shoes
Three identical magnets are held as shown and then released together. What arrangement will they form when they are released?
An apartment with ten floors has a water supply design as shown in the figure. If three people on the 1st, 5th and 10th floors open their taps at the same time, where will the pressure be the maximum?
Four school bags of the same size and dimensions but with different strap sizes are available. Among these, the strap offering the most comfort while carrying the bag would be __________________.
Four students saw a stone and a bunch of feathers being dropped from the same height at the same instant. The stone landed on the ground much before the feathers did. The person who conducted the experiment asked them as to the reason why the stone fell first.
The reasons given were as follows:
Nitya: The stone falls faster as a heavier object always falls faster than a lighter one.
Kenneth: The stone falls faster as there is no force acting on it.
Priya: The feathesr falls more slowly as it has less gravitation force acting on it.
Ruchira: The feathers falls more slowly as there is more air resistance acting on it.
Which of them is correct?
Observe the figures given below carefully.
Volume of water in each vessel is shown above. The order of the vessels in decreasing pressure at the base of each vessel is
Explain why water comes out more slowly from an upstairs tap than from a similar tap downstairs.
Water from upstairs tap
Water from downstairs tap
