Hi I was doing this question and I found it bit tricky but I've got it now! I was wondering if anyone knew what topic it's from so that i can practice more of these questions It's from the 2022 Maths Edexcel Mechanics paper!

3. [In this question, i and j are horizontal unit vectors.]

A particle P of mass 4 kg is at rest at the point A on a smooth horizontal plane.

At time t = 0, two forces, F1 = (4i – j)N and F2 = (λi + μj)N, where λ and μ are

constants, are applied to P

Given that P moves in the direction of the vector (3i + j)

(a) show that

λ – 3μ + 7 = 0

(4)

At time t = 4 seconds, P passes through the point B.

Given that λ = 2

(b) find the length of AB.

(5)

3. [In this question, i and j are horizontal unit vectors.]

A particle P of mass 4 kg is at rest at the point A on a smooth horizontal plane.

At time t = 0, two forces, F1 = (4i – j)N and F2 = (λi + μj)N, where λ and μ are

constants, are applied to P

Given that P moves in the direction of the vector (3i + j)

(a) show that

λ – 3μ + 7 = 0

(4)

At time t = 4 seconds, P passes through the point B.

Given that λ = 2

(b) find the length of AB.

(5)

I would say Kinematics, but with a bit of vectors as well.

Here's a decent sheet from Physics and Maths Tutor with answers at the end:

https://pmt.physicsandmathstutor.com/download/Maths/A-level/Mechanics/Kinematics-2/Edexcel-Set-A/Kinematics%20-%20Problems%20with%20vectors%201.pdf

Here's a decent sheet from Physics and Maths Tutor with answers at the end:

https://pmt.physicsandmathstutor.com/download/Maths/A-level/Mechanics/Kinematics-2/Edexcel-Set-A/Kinematics%20-%20Problems%20with%20vectors%201.pdf

Original post by CoherentCrib

I would say Kinematics, but with a bit of vectors as well.

Here's a decent sheet from Physics and Maths Tutor with answers at the end:

https://pmt.physicsandmathstutor.com/download/Maths/A-level/Mechanics/Kinematics-2/Edexcel-Set-A/Kinematics%20-%20Problems%20with%20vectors%201.pdf

Here's a decent sheet from Physics and Maths Tutor with answers at the end:

https://pmt.physicsandmathstutor.com/download/Maths/A-level/Mechanics/Kinematics-2/Edexcel-Set-A/Kinematics%20-%20Problems%20with%20vectors%201.pdf

Thank you!

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