What have you tried? Post your working - it's never sensible to look at the answer too quickly btw.
I've only managed to do part a😭. For b and c, I think I'm a bit confused as to what the question is even asking me to do, and that is why I don't understand the markscheme
I've only managed to do part a😭. For b and c, I think I'm a bit confused as to what the question is even asking me to do, and that is why I don't understand the markscheme
As Muttley says, perhaps put aside the mark scheme and think about the maths / physics for a bit...
For part (b) you are given the initial velocity, which has a horizontal (i-) component and a vertical (j-) component. As the ball moves from O to A, which component(s) vary. Does one or both of the components have a minimum value during the motion? How does speed depend on the two components?
You should be able to write down the answer - hence only 1 mark
As Muttley says, perhaps put aside the mark scheme and think about the maths / physics for a bit... For part (b) you are given the initial velocity, which has a horizontal (i-) component and a vertical (j-) component. As the ball moves from O to A, which component(s) vary. Does one or both of the components have a minimum value during the motion? How does speed depend on the two components? You should be able to write down the answer - hence only 1 mark
ohh yes the horizontal component is the one that stays the same throughout the journey hence 9 🫢 for part c, I don't understand what equation they've used, I thought I could just use suvat after working out the vertical component of the velocity
ohh yes the horizontal component is the one that stays the same throughout the journey hence 9 🫢 for part c, I don't understand what equation they've used, I thought I could just use suvat after working out the vertical component of the velocity
You can (and that's what they've done: found the start and end vertical velocities for which the total speed is < 12 m/s, then solve for time given acceleration).