9702_s19_qp_13
A paper of Physics, 9702
Questions:
40
Year:
2019
Paper:
1
Variant:
3
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12
A shop sign weighing 75 N hangs from a frame attached to a vertical wall. 30° 0.50 m Y X Z sign weight 75 N wall The frame consists of a horizontal rod XY and a rod YZ that is at an angle of 30° to the horizontal. Rod XY is attached to the wall by a hinge at X and has length 0.50 m. Assume that the weights of the rods are negligible. What is the horizontal force exerted by the wall on rod XY?
6. Deformation of solids  →  6.1. Stress and strain
4. Forces, density and pressure  →  4.2. Equilibrium of forces
3. Dynamics  →  3.1. Momentum and Newton’s laws of motion
Open
17
A lead pellet is shot vertically upwards into a clay block that is stationary at the moment of impact but is able to rise freely after impact. lead pellet mass 5.0 g stationary clay block mass 95 g impact velocity 200 m s–1 The mass of the pellet is 5.0 g and the mass of the clay block is 95 g. The pellet hits the block with an initial vertical velocity of 200 m s–1. It embeds itself in the block and does not emerge. How high above its initial position will the block rise?
3. Dynamics  →  3.1. Momentum and Newton’s laws of motion
Open
26
An elastic string is attached to an oscillator at one end and clamped at the other end so that the string is horizontal and in tension. The oscillator is made to oscillate vertically. The frequency of oscillation is gradually increased from zero until a stationary wave is set up in the string. The frequency is then increased further to frequency f, when a second stationary wave is set up in the string. The frequency is then increased further. At which frequency does a third stationary wave occur?
8. Superposition  →  8.1. Stationary waves
Open