Pressure (solid, liquid, gas)

A woman has 4 type of shoes. Which will exert the greatest pressure on the ground when she wears them?

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Diagram below shows a water reservoir. The base of the wall is thicker because

• it will be more stable

• the density of the water is high

• pressure of the water is highest at the surface

• Pressure of the water is highest at the base

Diagram shows water spurting out from a flask when a force is exerted on the piston. Why does the water spurt out uniformly in all direction？

• Force is exerted uniformly

• Surface area of piston is small

• Pressure is transmitted uniformly

• The holes on the surface of the flask are small

Diagram below shows a hydraulic jack in equilibrium. Calculate the value of F.

• 10 N

• 20 N

• 30 N

• 40 N

Diagram shows the random motion of the gas molecules inside a container. The pressure of the gas will NOT increase if

• The number of molecules in the container is increased

• The mass of the molecules is increased

• The speed of the molecules is increased

• The volume of the container is increased

Si unit of pressure

• Nothing

• Jule

• Pascal

• Isaac Newton

Which of the following is true about the two pistons in the car brake system?

• The brake pedal piston is larger than the brake pad piston.

• The brake pad piston is larger than the brake pedal piston.

• Both pistons are the same size.

If the force exerted on the small piston is 10 N, how much force will be exerted on the large piston?

• 10 N

• .1 N

• 100 N

• .01 N

Where is pressure greater - at the top of the atomizer tube OR at the bottom of the atomizer tube when spraying perfume?

• top

• bottom

If the horse reared up on 2 legs what effect would it have on the pressure?

• it will exert half the pressure it did before
• it will exert the same pressure it did before
• it will exert twice the pressure it did before
• it will exert four times the pressure it did before