9702_w22_qp_13
A paper of Physics, 9702
Questions:
40
Year:
2022
Paper:
1
Variant:
3
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6
On the Earth, an object takes time TE to fall from rest through a vertical distance h. On the Moon, the same object takes time TM to fall from rest through the same vertical distance h. The ratio Moon the on fall free of on accelerati Earth the on fall free of on accelerati is equal to 6. Air resistance is negligible for the object on the Earth and on the Moon. What is the ratio M E T T ?
2. Kinematics  →  2.1. Equations of motion
3. Dynamics  →  3.1. Momentum and Newton’s laws of motion
3. Dynamics  →  3.2. Non-uniform motion
Open
10
Two blocks are at rest on a frictionless horizontal surface. One block is made of wood and the other block is made of steel. A steel ball is fired horizontally with a speed v at the wooden block. The ball embeds itself in the block, and the ball and block move together after impact. A second identical steel ball is fired horizontally with speed v at the steel block. The steel ball then rebounds back along its original path with speed v . before impact wood v steel v after impact wood steel v The wooden block and the steel block have equal mass. Which statement about the blocks immediately after the collisions is correct?
3. Dynamics  →  3.1. Momentum and Newton’s laws of motion
Open
20
A spring has spring constant k. The spring obeys Hooke’s law and experiences extension x when a force F is applied to it. The resulting elastic potential energy of the spring is EP. The diagram shows two of these springs joined together in parallel and hanging from a fixed beam. F spring What is the extension and total elastic potential energy of this arrangement when the same force F is applied?
6. Deformation of solids  →  6.2. Elastic and plastic behaviour
6. Deformation of solids  →  6.1. Stress and strain
Open
37
A cell E, of electromotive force (e.m.f.) 2 V and negligible internal resistance, is connected to a uniform resistance wire of resistance 10  and length 1.0 m. E Z P Q resistance wire Z is a connection that may be made at any position along the resistance wire. A galvanometer is connected between Z and a point Q. A new source of e.m.f. of approximately 8 mV is connected between points P and Q. The e.m.f. of the new source is determined by changing the position of Z until the reading on the galvanometer is zero. Which change to the circuit allows a much more precise value for the e.m.f. of the new source to be obtained?
10. D.C. circuits  →  10.1. Practical circuits
10. D.C. circuits  →  10.3. Potential dividers
Open