4 (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 7 shows a box at rest on a floor - Edexcel - GCSE Physics - Question 4 - 2018 - Paper 1
Question 4
4 (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 qu... show full transcript
Worked Solution & Example Answer:4 (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 7 shows a box at rest on a floor - Edexcel - GCSE Physics - Question 4 - 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 the gravitational force. This is due to the mutual attraction between the Earth and the Moon, which keeps the Moon in its orbit.
Step 2
Which of these is a scalar quantity?
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Answer
The scalar quantity among the options provided is energy. Scalars are quantities that are fully described by a magnitude alone, while vectors are described by both magnitude and direction.
Step 3
Add another vector to the diagram in Figure 7 to show the weight of the box.
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Answer
In the diagram (Figure 7), I would add a downward vector labeled 'weight of the box' to represent the gravitational force acting on the box. This vector should be of equal length to the force exerted by the floor on the box, indicating that the box is in equilibrium.
