Energy, Work and Power quiz for Singapore O-Level Physics (SEAB 6091) quiz

Energy can be created when needed

Energy is always lost completely as heat

Energy cannot be created or destroyed, only transferred or converted

Energy increases over time in any system

$10\ \text{J}$

$100\ \text{J}$

$20\ \text{J}$

$50\ \text{J}$

$180\ \text{J}$

$5.0\ \text{J}$

$36\ \text{J}$

$24\ \text{J}$

$2700\ \text{W}$

$300\ \text{W}$

$0.0033\ \text{W}$

$903\ \text{W}$

$125\%$

$20\%$

$80\%$

$100\%$

Because friction adds energy

Because mass is always lost

Because power is always low

Because energy is conserved, so output cannot exceed input

$60\ \text{J}$

$6.0\ \text{J}$

$15\ \text{J}$

$600\ \text{J}$

No force is acting

The bag does not move in the direction of the force

The force is too small

Energy is being created

It doubles

It stays the same

It quadruples

It halves

Kinetic energy to gravitational potential energy

Elastic potential energy to thermal energy

Chemical energy to kinetic energy

Gravitational potential energy to kinetic energy

Watt

Joule

Newton

Pascal

Motor A has half the power of motor B

Motor A has twice the power of motor B

Both have the same power

Motor A has no power