TYS 5076 SP 2020

Which order shows units of energy in the correct order of increasing size?

• J ► kJ ► mJ ► nJ

• mJ ► nJ ► J ► kJ

• nJ ► mJ ► J ► kJ

• MJ ► J ► kJ ► GJ

Answer explanation

The diagram shows the scales on a micrometer screw gauge and a vernier caliper.

What are the readings on the micrometer screw gauge and on the vernier caliper?

• micrometer scale reading/mm: 6.77,

  vernier scale

  reading/mm: 1.7

• micrometer scale reading/mm: 6.77,

  vernier scale

  reading/mm: 2.7

• micrometer scale reading/mm: 7.77,

  vernier scale

  reading/mm: 2.7

• micrometer scale reading/mm: 7.77,

  vernier scale

  reading/mm: 1.7

A large wooden crate of mass 160kg is pushed across a rough floor with a force of 240N. The

acceleration of the crate is o. 50 m/s².

What is the frictional force on the crate?

• 80N

• 120N

• 160N

• 1600N

A 1 kg object is on the surface of the Earth, the International Space Station (a satellite in space)

and the surface of the Moon.

Where is the inertia of the object the largest?

• on the surface of the Earth

• on the International Space Station

• on the surface of the Moon

• it is the same in all three locations

Answer explanation

The weight of objects varies on different planets within the Solar System depending on the

strength of the planet's gravitational field.

Which object has the smallest mass?

• 9 N/kg,

  225 N

• 10 N/kg,

  150 N

• 11 N/kg,

  220 N

• 25 N/kg,

  125 N

Answer explanation

A window in an aeroplane has an area of 0.16 m².

The pressure inside the aeroplane is 80 kPa and the pressure outside is 50 kPa.

What is the value of the total force acting on the window due to these pressures?

• 4800N

• 8000N

• 12800N

• 20800N

Answer explanation

An energy transfer takes place inside a closed system.

Which statement about the total energy in the system is correct?

• It decreases.

• It increases.

• It stays the same.

• It is zero.

Answer explanation

A mass on a spring oscillates up and down with a constant amplitude.

At the top of its motion:

-the mass has no kinetic energy

-the mass has gravitational potential energy of 9.0 J

-the elastic potential energy in the compressed spring is 1.0J.

At another position, the mass has kinetic energy of 1.8 J and gravitational potential energy of

5.0J.

What is the elastic potential energy in the spring at this new position?

• 2.2J

• 3.2J

• 4.0J

• 5.0J

Answer explanation

A liquid is heated.

Which statement about the molecules in the liquid is not correct?

• They expand.

• They gain energy.

• They move further apart.

• They move faster.

Answer explanation

A heated surface loses heat by radiation.

What does not affect the amount of heat lost per square metre of the surface?

• the area of the surface

• the colour of the surface

• the roughness of the surface

• the temperature of the surface

Answer explanation