3 (a) (i) Which of these forces keeps the Moon moving around the Earth?
A contact
B electrostatic
C gravitational
D magnetic
(ii) Which of these is a scalar quantity?
A velocity
B momentum
C energy
D acceleration
(b) Figure 4 shows a box at rest on a floor - Edexcel - GCSE Physics Combined Science - Question 3 - 2018 - Paper 1
Question 3
3 (a) (i) Which of these forces keeps the Moon moving around the Earth?
A contact
B electrostatic
C gravitational
D magnetic
(ii) Which of these is a scalar q... show full transcript
Worked Solution & Example Answer:3 (a) (i) Which of these forces keeps the Moon moving around the Earth?
A contact
B electrostatic
C gravitational
D magnetic
(ii) Which of these is a scalar quantity?
A velocity
B momentum
C energy
D acceleration
(b) Figure 4 shows a box at rest on a floor - Edexcel - GCSE Physics Combined Science - Question 3 - 2018 - Paper 1
Step 1
Which of these forces keeps the Moon moving around the Earth?
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Answer
The force that keeps the Moon moving around the Earth is C gravitational. Gravitational force is the attractive force between two masses, in this case, the Earth and the Moon.
Step 2
Which of these is a scalar quantity?
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Answer
The scalar quantity from the options given is C energy. Scalar quantities have magnitude only, whereas vector quantities have both magnitude and direction.
Step 3
Add another vector to the diagram in Figure 4 to show the weight of the box.
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Answer
To show the weight of the box in Figure 4, draw a downward vector from the box labeled 'weight of the box'. This vector illustrates the gravitational force acting on the box.
