PHYSICS - Forces - Formulae (Force, Mass, Velocity, Acceleration)

The video explores the relationship between force, mass, velocity, and acceleration. It explains velocity as a vector quantity and introduces the formula for acceleration. Examples illustrate how force affects acceleration, with Newton's second law highlighting the dependency on mass. Negative acceleration is discussed, and practical examples demonstrate force calculations in various scenarios.

What is velocity defined as in physics?

• The speed in a particular direction

• The mass of an object

• The force applied on an object

• The rate of change of distance

How is acceleration calculated?

• Force divided by mass

• Final velocity minus initial velocity divided by time

• Mass times velocity

• Initial velocity minus final velocity divided by time

What is the unit of force?

• Joule

• Kilogram

• Meter per second

• Newton

According to Newton's second law, what does the acceleration of an object depend on?

• The mass of the object and the force applied

• The speed of the object

• The direction of the object

• The time taken for the motion

If a cyclist applies brakes and slows down, what type of acceleration is this?

• Constant acceleration

• Negative acceleration

• Positive acceleration

• Zero acceleration

A motorbike increases its speed from 10 m/s to 30 m/s in 10 seconds. What is the acceleration?

• 4 m/s²

• 3 m/s²

• 1 m/s²

• 2 m/s²

A jet fighter stops in 3.5 seconds. What does this scenario illustrate?

• Positive acceleration

• Uniform motion

• Constant speed

• Deceleration