Forces and Dynamics quiz for Singapore N(A)-Level Science (Physics) (SEAB 5105/5106) quiz

$12\ \text{m s}^{-2}$

$45\ \text{m s}^{-2}$

$0.2\ \text{m s}^{-2}$

$5.0\ \text{m s}^{-2}$

Force

Time

Mass

Temperature

$70\ \text{N}$

$30\ \text{N}$

$20\ \text{N}$

$50\ \text{N}$

Newton's third law

Newton's second law

Newton's first law

The principle of moments

$7.5\ \text{N m}$

$75\ \text{N m}$

$30.4\ \text{N m}$

$12\ \text{N m}$

Zero

Equal to the driving force

Equal to the friction only

Equal to the weight

The force it exerts on the ground

Its tendency to resist a change in its motion

Its speed at a given instant

The energy stored in it

$0.75\ \text{N}$

$7.0\ \text{N}$

$12\ \text{N}$

$1.3\ \text{N}$

They act on the same object

They always cancel out

They are always unequal in size

They are equal in size and opposite in direction, acting on different objects

It lets shoes grip the ground when walking

It wears out tyres

It heats up machine parts

It slows down a falling raindrop only

Clockwise moments exceed anticlockwise moments

The sum of clockwise moments equals the sum of anticlockwise moments

All forces must be equal

The pivot must be at the centre

The acceleration halves

The acceleration stays the same

The acceleration doubles

The acceleration becomes zero

$200\ \text{N m}$

$401\ \text{N m}$

$0.0025\ \text{N m}$

$400\ \text{N m}$

The perpendicular distance is larger, giving a bigger moment

The force becomes larger

The nut becomes lighter

Friction disappears