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.
W= m x g = 5 x 100 = 500 N
A bag of sugar is lifted onto a high table. State two energy stores in the sugar. __________________________ and __________________________
GPE and Chemical
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. ________
Thermal
What is dissipated energy?
Energy that spreads out and becomes less useful
The quantity of matter in an object. ______________
Mass
An electric motor works on electrical energy. [2] The motor changes electrical energy in three ways. Write the energy in the correct columns.
Usefull : Kinetic, Wasted : thermal, sound
What is the unit of weight?
Newton (N)
What is the SI unit of mass?
Kilogram (kg)
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.________________
12 hours
What form of energy change does this picture shows?
Electric to thermal
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] _____________ _____________
Container and surrounding
Write the letter or letters where there will be high tide on Earth in this diagram.______________
B and D
Which of these can be dissipated? Choose all that are correct. chemical / thermal / light / sound / elastic
Thermal / Light / Sound
What form of energy change does this picture shows?
Chemical to light
Complete the sentence using the most appropriate words. As the mass of a planet ____________________ the strength of gravity on the planet ____________________
Increase, Increase or Decrease, decrease
The force of gravity on an object. ______________
Weight
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