Exploring Forces and Motion with Marbles

The video tutorial explores the concept of rolling friction using marbles on a track. Initially, a marble is released and slows down due to rolling friction, which is an unbalanced force opposing its motion. A second marble is introduced, and the friction quickly stops both marbles. A third, magnetic marble is then used, which applies a greater force, resulting in increased acceleration. The video demonstrates how combining forces leads to greater acceleration.

What causes the first marble to lose velocity as it moves along the track?

• Gravitational pull

• Rolling friction

• Magnetic force

• Air resistance

Why can the first marble never reach the original height from which it was released?

• It loses energy due to air resistance

• Rolling friction slows it down

• The track is too short

• It is too heavy

What happens when the second marble is placed and let go?

• It moves in the opposite direction

• It accelerates indefinitely

• It transfers some momentum but stops quickly due to friction

• It remains stationary

What is the key difference between the third marble and the first two marbles?

• The third marble is larger

• The third marble is magnetic

• The third marble is lighter

• The third marble is made of a different material

How does the magnetic property of the third marble affect its motion?

• It slows down more quickly

• It remains stationary

• It moves in a circular path

• It applies a greater force, causing more acceleration

What happens when the magnetic marble is pushed slightly?

• It stops immediately

• It decelerates

• It accelerates even more due to the sum of forces

• It moves at a constant speed