PSLE Science: Energy and Ball Bouncing

What is the main topic discussed in the video?

• Energy conversion in a bouncing ball

• The water cycle

• The lifecycle of plants

• Photosynthesis process

What type of energy does the ball have when it is held at a height of 10 meters?

• Kinetic energy

• Sound energy

• Thermal energy

• Gravitational potential energy

When the ball is released and starts moving, what energy conversion takes place?

• Thermal to gravitational potential

• Sound to kinetic

• Gravitational potential to kinetic

• Kinetic to thermal

Why does using a lighter ball not help it bounce higher?

• It increases friction

• It decreases gravitational potential energy

• It increases air resistance

• It decreases kinetic energy

What happens to the kinetic energy when a heavier ball is used?

• It is lost as heat and sound due to friction

• It remains unchanged

• It is completely converted to sound energy

• It increases the bounce height to 10 meters

Why does dropping the ball onto softer ground not help it bounce higher?

• The ground becomes harder

• The ball absorbs more energy

• The ground absorbs more energy

• The ball becomes heavier

What happens to some of the kinetic energy when the ball rubs against the ground?

• It is stored as potential energy

• It is converted to gravitational potential energy

• It is converted to sound and heat energy

• It is completely lost

What is the effect of dropping the ball from a height greater than 10 meters?

• The ball will bounce lower

• The ball will not bounce at all

• The ball will bounce to the same height

• The ball will bounce higher

Which option correctly allows the ball to bounce back to 10 meters?

• Using a lighter ball

• Using a heavier ball

• Dropping onto softer ground

• Dropping from a height greater than 10 meters

What is the main reason a ball cannot bounce back to its original height?

• Excessive gravitational pull

• Insufficient mass

• Energy loss due to friction

• Air resistance