Chapter 3 Forces & Pressure

Diagram 7 shows sole of a golf shoe.

What is the physics concept involved in the above situation?

• Force

• Presure

• Force in equilibrium

• Transmission of pressure

Diagram 8 shows water spurts out from a container.

The observation shows that

• the smaller the volume of water, the greater the pressure

• the greater the volume of water, the greater the pressure

• the greater the depth of water, fr, the greater the pressure

• the smaller the depth of water, h, the greater the pressure

Diagram 9 shows a student pumps a balloon.

Which of the following uses the same principle as above?

• Hydrometer

• Pressing a tooth paste

• Box floating in water

• Pressing thumbtack into a board

Diagram 10 shows a hydraulic jack.

Which modification on piston P will increase the pressure in piston Q?

• Decrease the height, h

• Decrease the volume of oil

• Decrease the cross-sectional area

• Decrease the thickness of the wall

Diagram 11 shows a Plimsoll line marked on the side of a ship.

The Plimsoll line is used as a reference line to prevent overloading.

The Plimsoll line is marked based on

• Pascal's Principle

• Bernoulli's Principle

• Archimedes Principle

• Principle of Conservation of Momentum

Diagram 12 shows a long glass tube full of mercury is inverted vertically and dipped into mercury.

Which point A, B, C or D, has a pressure equals to the atmospheric pressure?

• A

• B

• C

• D

Diagram 13 shows a top view of a sailboat sailing against the direction of wind.

Which direction A, B, C or D, the lift force acting on the sail?

• A

• B

• C

• D

Diagram 7 shows force F₁ exerted on a small piston producing pressure P_1. Pressure P₁is transferred to the large piston to produce pressure P₂ and force F₂.

Which comparison is correct?

• F₁= F₂

• F₁> F₂

• P₁= P₂

• P₁= >P₂

Diagram 8 shows an apparatus set-up to measure pressure in liquid.

What happens to the height of water h. if the thistle funnel is lowered from level

P to Q?

• Increases

• Decreases

• No change

Diagram 9 shows a man standing on one leg. His weight is 720 N and the surface area of his shoe is 0.02 m².

What is the pressure exerted by the man?

• 14.4 Pa

• 28.8 Pa

• 18000 Pa

• 36000 Pa