CHAPTER 3 FORCES AND PRESSURE
Quiz by WINNIE LIM
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- Q 1/18Score 0Diagram 1 shows a watermelon and a durian of the same mass placed in two identical plastics bags. Plastic bag containing the durian tear more easily because29the pressure exerted by the durian on the plastic bag is largerthe force exerted by the durian on the plastic bag is largerthe surface of the durian is rougherthe surface area of the durian that is in contact with the plastic bag is larger
18 questions
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- Q1Diagram 1 shows a watermelon and a durian of the same mass placed in two identical plastics bags. Plastic bag containing the durian tear more easily becausethe pressure exerted by the durian on the plastic bag is largerthe force exerted by the durian on the plastic bag is largerthe surface of the durian is rougherthe surface area of the durian that is in contact with the plastic bag is larger45s
- Q2Diagram 3 shows a block with the dimensions of 2 m × 4 m × 10 m. The weight of the block is 100 N. Find the minimum pressure that can be exerted by the block on the floor.5.0 N m-212.5 N m-22.5 N m-210.0 N m-260s
- Q3Diagram 9 shows two identical containers containing liquid X and liquid Y with 12 cm height and 17 cm height respectively. Both containers produce the same water spurt. If the density of liquid X is 1.7 g cm−3, find the density of liquid Y.0.83 g cm−31.20 g cm−32.40 g cm−30.60 g cm−3120s
- Q4Liquid pressure is affected by the diameter of the tube.falsetrueTrue or False45s
- Q5What happens to the gas molecules in a sealed jar at room temperature when the jar is put inside a refrigerator?the distance between the gas molecules decreasesThe mass of the gas molecules decreasesThe potential energy of the gas molecules increasesThe size of the gas molecules decreases45s
- Q6What is the value of atmospheric pressure in cm HgUsers enter free textType an Answer45s
- Q7Diagram 26 shows a brake system used in a car. State the principle involved.Users enter free textType an Answer60s
- Q8Diagram 29 shows an hot air balloon floating at a constant height. The upthrust exerted on the hot air balloon is equal tothe volume of the hot air balloonthe density of the hot air balloonthe density of the hot air balloonthe weight of the hot air balloon45s
- Q9Diagram 35 shows a wing in the shape of an aerofoil moves through air. Which position A, B, C or D, experiences the highest pressure?BCDA45s
- Q10Why the candle flames approach one another when air is blown between them?A vacuum area exists between the candle flamesPressure between the candle flames becomes lowHot air at the bottom of the candles risesDensity of air between the candle flames becomes low45s
- Q11Diagram shows a load is attached to a spring balance and a beaker of water is put on a compression balance. What will happen to the reading of compression balance when the load is immersed completely in the water?Users enter free textType an Answer60s
- Q12A block of metal of mass 0.20 kg and volume 2.5 × 10 − 4 m3 is dropped into water. How does the metal block move in the water? [Density of water = 1 000 kg m− 3]It moves upwards with a constant velocity.It moves downwards with a constant velocity.It moves downwards with a fixed acceleration.It moves upwards with a fixed acceleration.120s
- Q13Diagram shows that a bottle which contains a few pieces of stone is floating vertically in a solution P.P < QP = QP > Q45s
- Q14Diagram shows a hydraulic system with two pistons. What is the mass of load X?0.4 kg0.04 kg2.5 kg25.0 kg120s
- Q15Diagram (a) shows the water levels in a water manometer before it is connected to a gas supply. Diagram (b) shows the water levels in the manometer when it is connected to a gas supply. Atmospheric pressure supports 10 m of water column in a water barometer. What is the pressure of the gas supply? (Density of water = 1 000 kg m–3)1.05 × 10 ^ 5 Pa1.02 × 10 ^ 5 Pa1.04 x 10 ^ 5 Pa5.00 x 10 ^5 Pa120s
