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 ... 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 the gravitational force. Gravity is the attractive force between the Earth and the Moon, which causes the Moon to orbit the Earth.
Step 2
Which of these is a scalar quantity?
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Answer
The scalar quantity among the options is energy. Scalar quantities have magnitude only, whereas velocity, momentum, and acceleration also have 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 represent the weight of the box in Figure 4, you should draw a vector pointing downwards from the center of the box, indicating the force of gravity acting on the box. This vector should be labeled 'weight of the box'.
