A level north west regional mock gce 2022 physics 2

A level north west regional mock gce 2022 physics 2

A level north west regional mock gce 2022 physics 2

SECTION I (I HOUR)
Answer ail the questions.
1. (a) State two factors that can be used to check the correctness of a physical equation.
The energy W, stored in a stretched wtre,s g,ven by the equal,on

Determine whether the equation is homogeneous or not. J.
2. Figure 1 shows a mJs, m attached to one end of a string of length Lin, and whirled in a horizontal
circle.

(a) The tension in the string.
(b) The period of revolution of the bob,
(c) The tangential velocity of the bob. (6 marks)
3. A 100kg mass is released at a point, P, and it moves along a frictionless track as shown in figure 2
below. P

X
(a) State the law of conservation of mechanical energy.
(b) Calculate the maximum velocity of the mass.
(c) The net change in potential energy of the mass. (6 marks)
4. (a) Distinguish between a photon and an electron.
(b) Account for the conservation of energy when a photon ejects an electron from the surface of a metal.
(c) Light of wavelength 5.8 x 10’14m falls on the surface of a certain photoelectron emitter of work
function 2.16eV. Determine whether photoelectrons would be emitted or not. (6 marks)

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