Question 17
Use g=9.8g = 9.8g=9.8 m s−2^{-2}−2.
A crate of mass 30 kg is dragged at a constant speed up a rough plane inclined at an angle of 12° 12°\,12° to the horizontal.
The crate is dragged by a rope which lies in the vertical plane containing a line of greatest slope and makes an angle of 18° 18°\,18° with the plane. The tension in the rope is T T\,T newtons.
The coefficient of friction between the crate and the plane is 0.45.
a.[6]
Find the value of TTT.
b.[2]
Explain why the tension needed would be greater if the rope were parallel to the plane.
4.9 Forces and Newton's laws (A-level only) Questions
106 exam-style questions on WJEC A Level Maths 4.9 Forces and Newton's laws (A-level only), covering 4.9.1 Forces and Newton's laws (A-level only), 4.9.2 Forces and Newton's laws (A-level only), 4.9.3 Forces and Newton's laws (A-level only), 4.9.4 Forces and Newton's laws (A-level only), and 4.9.5 Forces and Newton's laws (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.