Newton's Second Law

The video tutorial explains Newton's Second Law of motion, focusing on the relationship between force, mass, and acceleration. It uses examples like a thrown ball and a ball with elastic to illustrate unbalanced forces. The tutorial also covers practical calculations involving spacecraft and cars, emphasizing the importance of units. It concludes by comparing the acceleration of a tennis ball and a shotput, highlighting the effect of mass on acceleration.

What force acts on a ball thrown upwards, neglecting air resistance?

• The upward force from your hand

• No force acts on the ball

• The downward force of gravity

• Both upward and downward forces

What happens to an object when subjected to an unbalanced force?

• It can only change direction

• It can speed up, slow down, or change direction

• It can only speed up

• It remains stationary

Why is it harder to change the direction of a heavier object?

• Heavier objects have more friction

• Heavier objects have less inertia

• Heavier objects require a larger force to change direction

• Heavier objects are more stable

How is the resultant force calculated according to Newton's Second Law?

• Resultant force equals mass plus acceleration

• Resultant force equals acceleration divided by mass

• Resultant force equals mass times acceleration

• Resultant force equals mass divided by acceleration

Why can you throw a tennis ball faster than a shotput?

• The tennis ball is smaller

• The shotput is heavier, so it accelerates less

• The shotput is more aerodynamic

• The tennis ball has more surface area