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GCSE Physics Question Help

Hey! Clueless on these questions, any help would be very much appreciated!

Q.2) I got the vector diagram with the diagonal line, but no clue where to go from there.

Q. 8iv) I don’t really understand the answer - could someone reword?

Q.1) same problem as above!

Thanks so much

https://pmt.physicsandmathstutor.com/download/Physics/GCSE/Topic-Qs/Edexcel/9-Forces-and-their-Effects/Set-B/9.1%20Types%20of%20Forces.pdf
In 8iv you have a cyclist going up the road vertically. This means that energy is transferred from chemical energy by the cyclist to allow them to gain gravitational potential energy as it is going up ‘Work done’ just refers to an energy transfer. Why might all the energy transferred be transferred to gravitational potential?. Because energy is dissipated through friction which means only some is transferred to gravitational potential.
Remember energy must be conserved, if it isn’t all being transferred to GPE then it must go somewhere else.

For question 1, the relationship just means what does the graph show. Look at the axis, as upward force in N increases so does speed in turns per minute. The next point is that it doesn’t follow a straight line (the gradient changes). This means it is non linear as it isn’t a straight line (linear)
Original post by crochetingduck
Hey! Clueless on these questions, any help would be very much appreciated!

Q.2) I got the vector diagram with the diagonal line, but no clue where to go from there.

Q. 8iv) I don’t really understand the answer - could someone reword?

Q.1) same problem as above!

Thanks so much

https://pmt.physicsandmathstutor.com/download/Physics/GCSE/Topic-Qs/Edexcel/9-Forces-and-their-Effects/Set-B/9.1%20Types%20of%20Forces.pdf

q2
you do pythagoras 20^2 + 20^2 =c^2 which you want to find out


q1
you just have to explain what the gradient means

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