A Level maths mechanics help

lee_miller7

pls help^^

Reply 1

lee_miller7

Original post by lee_miller7

pls help^^

Reply 2

mqb2766

Original post by lee_miller7

Just integrate velocity to get displacement (in both i and j directions), using the t=1 info to get the integration constants, then pythagoras at t=3 as its distance rather than displacement.

Reply 3

lee_miller7

Original post by mqb2766

Just integrate velocity to get displacement (in both i and j directions), using the t=1 info to get the integration constants, then pythagoras at t=3 as its distance rather than displacement.

ok thanks I hadn't learnt about integrating vectors yet so I didn't think of that

Reply 4

mqb2766

Original post by lee_miller7

ok thanks I hadn't learnt about integrating vectors yet so I didn't think of that

Just integrate the i and j parts seperately as motion is independent.

(edited 11 months ago)

Reply 5

lee_miller7

Original post by mqb2766

Just integrate the i and j parts seperately as motion is independent.

is this right?

Reply 6

mqb2766

Original post by lee_miller7

is this right?

Not quite, each dimension is a seperate integral, so each requires its own constant. Alternatively the constant of integration is somethig like 3i + 5j, so a vector.

Reply 7

lee_miller7

Original post by mqb2766

Just integrate the i and j parts seperately as motion is independent.

Original post by mqb2766

Not quite, each dimension is a seperate integral, so each requires its own constant. Alternatively the constant of integration is somethig like 3i + 5j, so a vector.