Force and Pressure

A book is kept on horizontal table. How many forces are acting on it?

• 0

• 1

• 2

• 3

What is the equation used to calculate pressure?

• pressure= force/mass
• pressure =mass/volume
• pressure=area/force
• pressure=force/area

Which of the statements is true?

• The bottom of the boot exerts more pressure than the shoe as a result of an increase in surface area.
• The bottom of the shoe exerts more pressure than the boot as a result of an decrease in surface area.
• The bottom of the shoe exerts the same pressure as the bottom of the boot.

A person wearing steel toe capped boots and a person wearing stilleto heels stand on a wooden floor. They both have the same weight. Which person exerts a greater pressure on the floor?

• The person wearing the boots because the boots have a larger surface area in contact with the floor
• The person with the stiletto heels because they have a larger surface area in contact with the floor
• The person wearing the boots because the boots have a smaller surface area in contact with the floor 
• The person with the stiletto heels because they have a smaller surface area in contact with the floor

What is a force that works AGAINST MOTION?

• Force
• Motion
• Gravity
• Friction

Tags

NGSS.3-PS2-1

Students roll toy cars down the same ramp with different coverings like carpet, foil, and sandpaper. What are they trying to test?

• How does the height of a ramp affect the distance a car will roll?

• How does the mass of the car affect the distance a car will roll?

• How does the surface of a ramp affect how fast a car will travel?

• How does the surface of a ramp affect the distance a car will roll?

In Fig two boys A and B are shown applying force on a block. If the block moves towards the right, which one of the following statements is correct?

• Magnitude of force applied by A is greater than that of B

• Magnitude of force applied by A is smaller than that of B.

• Net force on the block is towards A.

• Magnitude of force applied by A is equal to that of B.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

During dry weather, while combing hair, sometimes we experience hair flying apart. The force responsible for this is___________

• force of gravity

• electrostatic force.

• force of friction.

• magnetic force

Tags

NGSS.MS-PS2-3

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.

Tags

NGSS.MS-PS2-2

which force is non contact force

• gravitational

• magnetic

• electrostatic

• all of the above

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-4

NGSS.MS-PS2-5