G7 CH3 - Force and Energy

What form of energy change does this picture shows?

Which of these can be dissipated? Choose all that are correct. chemical / thermal / light / sound / elastic

What is the SI unit of mass?

The quantity of matter in an object. ______________

The strength of gravity on a planet is 5 N/kg. Calculate the weight of an 100 kg spacecraft on that planet. Show your working and give the unit in your answer.

What is the unit of weight?

A bag of sugar is lifted onto a high table. State two energy stores in the sugar. __________________________ and __________________________

What form of energy change does this picture shows?

Complete the sentence using the most appropriate words. As the mass of a planet ____________________ the strength of gravity on the planet ____________________

An electric motor works on electrical energy. [2] The motor changes electrical energy in three ways. Write the energy in the correct columns.

What is dissipated energy?

The force of gravity on an object. ______________

A container of water is placed over a fire that burns wood. a. Name the energy that is transferred from the fire to the water. ________

There is also low tide at a place in the diagram. State the number of hours until the next low tide in the same place.________________

Write the letter or letters where there will be high tide on Earth in this diagram.______________

A container of water is placed over a fire that burns wood. Not all of this energy is transferred to the water. List two other places where this energy could go. [2] _____________ _____________