Page 149 - Big Ideas Year 10 sciPAD 2025
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SCIPAD - BIG IDEAS - BOOK 2
FORCES AND MOTION
		 (i) Draw labelled arrows to show the relative size of the two main forces acting
on the cup of coffee.
		 (ii) Identify whether the forces on the cup are balanced or unbalanced.
		­
		 (iii) Justify your answer to e(ii) above. 

4. Friction is a force that opposes the movement of an object. Give three examples when:
(a) Friction is helpful.
		 (i) 
		 (ii) 
		 (iii) 
(b) Friction is unhelpful.
		 (i) 
		 (ii) 
		 (iii) 
(c) Justify you answer to (b). 

(d) The cup of coffee has a mass of 0.4 kg.
		 (i) Describe the difference between mass and weight. 



		 (ii) Calculate the weight of the cup of coffee.
		


(e) A student gets over-excited about the possibility of becoming the teacher’s pet
and trips over. The coffee cup falls straight down onto the teachers lap.
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