Pressure

Watch the tyres of tractor rolling. Rear tyres are broader because

• It looks good.

• Broader tyres lessen the muscular Force required.

• Broader tyres lessen the pressure on ground.

• Broader tyres lessen the friction on ground.

When you increase your depth under water, the water pressure on your body

• increases

• decreases

• stays the same

Which best explains why increasing the pressure on a gas decreases the volume of the gas sample?

• Increasing the pressure causes the gas particles to hit the container walls more often.

• Increasing the pressure on a gas sample moves the gas particles closer together.

• Increasing the pressure on a gas sample causes the kinetic energy to increase.

A man and his son are building a tree house. If they start by putting a wooden plate of weight 520 N above two thick branches as the floor, the contact area between the wooden plate and the two branches becomes 1.2 m².If the man weighs 700 N and his son weighs 350 N and both of them are standing on the wooden plate, what is the total pressure which affects the two branches due to the wooden plate, the man, and his son?

• 875 Pa

• 1‎ ‎570 Pa

• 1‎ ‎260 Pa

• 1‎ ‎308 Pa

Which of the following would increase the pressure on a system?

• Increase the Temperature
• Pump in more gas
• Decrease the volume
• All of these

According to Bernoulli's Principle, when the wind speed is high, wind pressure is ________

• high
• low
• not enough information
• None of the above

Force changes the

• Motion of body

• Speed of body

• Shape of body

• All of these

A brick is kept in three different ways on a table as shown in Fig. The pressure exerted by the brick on the table will be

• maximum in position A

• maximum in position B

• maximum in position C

• equal in all cases.