Force and Pressure

What are the different types of forces?

• Gravitational force, electromagnetic force, weak nuclear force, and strong nuclear force

• Centripetal force, centrifugal force, and elastic force

• Magnetic force, electric force, and kinetic force

• Frictional force, tension force, and normal force

Explain the difference between contact and non-contact forces.

• Contact forces only occur in outer space

• Contact forces require physical contact between two objects, while non-contact forces can act at a distance.

• Contact forces are stronger than non-contact forces

• Non-contact forces can only act on living organisms

Calculate the force when a 5 kg object is accelerated at 2 m/s^2.

• 10 N

• 3 N

• 15 N

• 7 N

Define pressure and its formula.

• P = F/V

• P = F*D

• P = A/F

• P = F/A

What is the unit of force?

• Meter (m)

• Kilogram (kg)

• Newton (N)

• Joule (J)

Describe the relationship between force, mass, and acceleration.

• Force is inversely proportional to mass and acceleration

• Force is directly proportional to acceleration but inversely proportional to mass

• Force is directly proportional to mass but inversely proportional to acceleration

• Force is directly proportional to mass and acceleration

Give an example of a force that acts at a distance.

• Electromagnetic force

• Gravitational force

• Magnetic force

• Frictional force

Explain the concept of balanced and unbalanced forces.

• Balanced forces are equal in size and opposite in direction, resulting in no change in motion. Unbalanced forces are unequal in size and/or not opposite in direction, resulting in a change in motion.

• Balanced forces are unequal in size and opposite in direction, resulting in a change in motion. Unbalanced forces are equal in size and opposite in direction, resulting in no change in motion.

• Balanced forces are equal in size and same in direction, resulting in no change in motion. Unbalanced forces are equal in size and opposite in direction, resulting in a change in motion.

• Balanced forces are unequal in size and opposite in direction, resulting in no change in motion. Unbalanced forces are equal in size and same in direction, resulting in a change in motion.

How does surface area affect pressure?

• Surface area and pressure are directly proportional

• Surface area has no effect on pressure

• Surface area and pressure are unrelated

• Surface area and pressure are inversely proportional

Calculate the pressure exerted by a force of 200 N on an area of 2 m^2.

• 400 Pa

• 250 Pa

• 100 Pa

• 50 Pa