Physics Quiz

Power is:

• the amount of energy converted per second

• the amount of work done

• measured in joules

If an object that weighs 400kg is pushed using a trolley a distance of 12m using a constant force of 80N the total work input required to move the trolley will be:

• 960 J

• 4,800J

• 5,760J

If a force is applied at right angles to the axis of rotation of a gyroscope it will move:

• in the direction of the applied force

• in a direction which leads the applied force by 90 degrees when the axis is viewed from above

• in a direction which lags the applied force by 90 degrees when the axis is viewed from above

The rigidity of a rotating gyroscope can be increased by:

• increasing the diameter whilst reducing the rotational speed

• reducing the friction within the gyroscope

• increasing the rotational speed or mass or both

Static Friction is:

• only present in a body at rest

• always present even when a body is in motion

• only present when a body is in motion

The momentum of a mass of 4 kg travelling at a speed of 8 m/s is:

• 128 kg m

• 32 kg m/s

• 16 m/s/kg

40 litres of fuel with a relative density of 0.7 would have a mass of:

• 57 Kg

• 28 Kg

• 42 Kg

As a fluid enters the throat of a venturi, the:

• flow decreases

• pressure decreases

• pressure increases

What effect does a rise in temperature have on the viscosity of a liquid?

• It becomes more viscous

• It becomes less viscous

• Temperature does not affect viscosity

If a gas in a sealed container is cooled, then its:

• pressure rises

• mass reduces

• pressure decreases