Grade 9 Work, Energy & Power

Why dropping HP from higher position make the phone more broken?

• It has more gravitational potential energy

• It has more elastic potential energy

• It has less kinetic energy

• It has less gravitational potential energy

What is the unit of kinetic energy?

• Joule

• Watt

• Newton

What is the unit of work done & power respectively?

• joule & watt

• watt & watt

• joule & joule

• newton & watt

Which list are only including stored energy?

• Kinetic, gravitational potential, strain

• Kinetic, gravitational potential, heat

• chemical potential, electrical, gravitational potential

• kinetic, sound, gravitational potential

What energy stored in this object?

• chemical potential

• gravitational potential

• electrical

• strain

A ball has mass of 8 kg and its position is on a table of 1.00 m from a ground. What is its GPE?

• 78 J

• 78 kg

• 8 J

• 8 kg

A helicopter of 1600 kg moves with speed of 20 m/s has .... of kinetic energy

• 16 000 J

• 1.6 kJ

• 320 J

• 320 kJ

What is energy stored in this trampoline?

• kinetic

• gravitational potential

• strain

• heat

Nuclear fission is when two smaller nuclei combine into a larger nucleus

• True

• False

Nuclear fusion is what happen in the Sun

• True

• False